Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target updates from Nicholas Bellinger:
 "The highlights this round include:

   - Update vhost-scsi to support F_ANY_LAYOUT using mm/iov_iter.c
     logic, and signal VERSION_1 support (MST + Viro + nab)

   - Fix iscsi/iser-target to remove problematic active_ts_set usage
     (Gavin Guo)

   - Update iscsi/iser-target to support multi-sequence sendtargets
     (Sagi)

   - Fix original PR_APTPL_BUF_LEN 8k size limitation (Martin Svec)

   - Add missing WRITE_SAME end-of-device sanity check (Bart)

   - Check for LBA + sectors wrap-around in sbc_parse_cdb() (nab)

   - Other various minor SPC/SBC compliance fixes based upon Ronnie
     Sahlberg test suite (nab)"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (32 commits)
  target: Set LBPWS10 bit in Logical Block Provisioning EVPD
  target: Fail UNMAP when emulate_tpu=0
  target: Fail WRITE_SAME w/ UNMAP=1 when emulate_tpws=0
  target: Add sanity checks for DPO/FUA bit usage
  target: Perform PROTECT sanity checks for WRITE_SAME
  target: Fail I/O with PROTECT bit when protection is unsupported
  target: Check for LBA + sectors wrap-around in sbc_parse_cdb
  target: Add missing WRITE_SAME end-of-device sanity check
  iscsi-target: Avoid IN_LOGOUT failure case for iser-target
  target: Fix PR_APTPL_BUF_LEN buffer size limitation
  iscsi-target: Drop problematic active_ts_list usage
  iscsi/iser-target: Support multi-sequence sendtargets text response
  iser-target: Remove duplicate function names
  vhost/scsi: potential memory corruption
  vhost/scsi: Global tcm_vhost -> vhost_scsi rename
  vhost/scsi: Drop left-over scsi_tcq.h include
  vhost/scsi: Set VIRTIO_F_ANY_LAYOUT + VIRTIO_F_VERSION_1 feature bits
  vhost/scsi: Add ANY_LAYOUT support in vhost_scsi_handle_vq
  vhost/scsi: Add ANY_LAYOUT iov -> sgl mapping prerequisites
  vhost/scsi: Change vhost_scsi_map_to_sgl to accept iov ptr + len
  ...

32 files changed, 829 insertions, 689 deletions

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index dafb3c531f96..075b19cc78e8 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -38,7 +38,7 @@
 #define ISER_MAX_CQ_LEN		(ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \
 				 ISERT_MAX_CONN)
 
-int isert_debug_level = 0;
+static int isert_debug_level;
 module_param_named(debug_level, isert_debug_level, int, 0644);
 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)");
 
@@ -949,7 +949,7 @@ isert_post_recv(struct isert_conn *isert_conn, u32 count)
 		isert_err("ib_post_recv() failed with ret: %d\n", ret);
 		isert_conn->post_recv_buf_count -= count;
 	} else {
-		isert_dbg("isert_post_recv(): Posted %d RX buffers\n", count);
+		isert_dbg("Posted %d RX buffers\n", count);
 		isert_conn->conn_rx_desc_head = rx_head;
 	}
 	return ret;
@@ -1351,17 +1351,19 @@ isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd
 	struct iscsi_conn *conn = isert_conn->conn;
 	u32 payload_length = ntoh24(hdr->dlength);
 	int rc;
-	unsigned char *text_in;
+	unsigned char *text_in = NULL;
 
 	rc = iscsit_setup_text_cmd(conn, cmd, hdr);
 	if (rc < 0)
 		return rc;
 
-	text_in = kzalloc(payload_length, GFP_KERNEL);
-	if (!text_in) {
-		isert_err("Unable to allocate text_in of payload_length: %u\n",
-			  payload_length);
-		return -ENOMEM;
+	if (payload_length) {
+		text_in = kzalloc(payload_length, GFP_KERNEL);
+		if (!text_in) {
+			isert_err("Unable to allocate text_in of payload_length: %u\n",
+				  payload_length);
+			return -ENOMEM;
+		}
 	}
 	cmd->text_in_ptr = text_in;
 
@@ -1434,9 +1436,15 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
 		ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr);
 		break;
 	case ISCSI_OP_TEXT:
-		cmd = isert_allocate_cmd(conn);
-		if (!cmd)
-			break;
+		if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) {
+			cmd = iscsit_find_cmd_from_itt(conn, hdr->itt);
+			if (!cmd)
+				break;
+		} else {
+			cmd = isert_allocate_cmd(conn);
+			if (!cmd)
+				break;
+		}
 
 		isert_cmd = iscsit_priv_cmd(cmd);
 		ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd,
@@ -1658,6 +1666,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err)
 	struct isert_conn *isert_conn = isert_cmd->conn;
 	struct iscsi_conn *conn = isert_conn->conn;
 	struct isert_device *device = isert_conn->conn_device;
+	struct iscsi_text_rsp *hdr;
 
 	isert_dbg("Cmd %p\n", isert_cmd);
 
@@ -1698,6 +1707,11 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err)
 	case ISCSI_OP_REJECT:
 	case ISCSI_OP_NOOP_OUT:
 	case ISCSI_OP_TEXT:
+		hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header;
+		/* If the continue bit is on, keep the command alive */
+		if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)
+			break;
+
 		spin_lock_bh(&conn->cmd_lock);
 		if (!list_empty(&cmd->i_conn_node))
 			list_del_init(&cmd->i_conn_node);
@@ -1709,8 +1723,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err)
 		 * associated cmd->se_cmd needs to be released.
 		 */
 		if (cmd->se_cmd.se_tfo != NULL) {
-			isert_dbg("Calling transport_generic_free_cmd from"
-				 " isert_put_cmd for 0x%02x\n",
+			isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n",
 				 cmd->iscsi_opcode);
 			transport_generic_free_cmd(&cmd->se_cmd, 0);
 			break;
@@ -2275,7 +2288,7 @@ isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
 	}
 	isert_init_send_wr(isert_conn, isert_cmd, send_wr);
 
-	isert_dbg("conn %p Text Reject\n", isert_conn);
+	isert_dbg("conn %p Text Response\n", isert_conn);
 
 	return isert_post_response(isert_conn, isert_cmd);
 }
@@ -3136,7 +3149,7 @@ accept_wait:
 	spin_lock_bh(&np->np_thread_lock);
 	if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) {
 		spin_unlock_bh(&np->np_thread_lock);
-		isert_dbg("np_thread_state %d for isert_accept_np\n",
+		isert_dbg("np_thread_state %d\n",
 			 np->np_thread_state);
 		/**
 		 * No point in stalling here when np_thread
@@ -3320,7 +3333,8 @@ static int __init isert_init(void)
 {
 	int ret;
 
-	isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0);
+	isert_comp_wq = alloc_workqueue("isert_comp_wq",
+					WQ_UNBOUND | WQ_HIGHPRI, 0);
 	if (!isert_comp_wq) {
 		isert_err("Unable to allocate isert_comp_wq\n");
 		ret = -ENOMEM;
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index eb694ddad79f..6e0a477681e9 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -3518,7 +3518,7 @@ static void srpt_close_session(struct se_session *se_sess)
 	DECLARE_COMPLETION_ONSTACK(release_done);
 	struct srpt_rdma_ch *ch;
 	struct srpt_device *sdev;
-	int res;
+	unsigned long res;
 
 	ch = se_sess->fabric_sess_ptr;
 	WARN_ON(ch->sess != se_sess);
@@ -3533,7 +3533,7 @@ static void srpt_close_session(struct se_session *se_sess)
 	spin_unlock_irq(&sdev->spinlock);
 
 	res = wait_for_completion_timeout(&release_done, 60 * HZ);
-	WARN_ON(res <= 0);
+	WARN_ON(res == 0);
 }
 
 /**
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index 73f9feecda72..99f43b7fc9ab 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -1570,9 +1570,7 @@ static int tcm_qla2xxx_check_initiator_node_acl(
 	 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
 	 */
 	memset(&port_name, 0, 36);
-	snprintf(port_name, 36, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
-		fc_wwpn[0], fc_wwpn[1], fc_wwpn[2], fc_wwpn[3], fc_wwpn[4],
-		fc_wwpn[5], fc_wwpn[6], fc_wwpn[7]);
+	snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
 	/*
 	 * Locate our struct se_node_acl either from an explict NodeACL created
 	 * via ConfigFS, or via running in TPG demo mode.
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index aebde3289c50..50bad55a0c42 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -30,7 +30,7 @@
 #include <target/target_core_fabric.h>
 #include <target/target_core_configfs.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_parameters.h"
 #include "iscsi_target_seq_pdu_list.h"
 #include "iscsi_target_tq.h"
@@ -45,7 +45,7 @@
 #include "iscsi_target_util.h"
 #include "iscsi_target.h"
 #include "iscsi_target_device.h"
-#include "iscsi_target_stat.h"
+#include <target/iscsi/iscsi_target_stat.h>
 
 #include <target/iscsi/iscsi_transport.h>
 
@@ -968,11 +968,7 @@ int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 
 	conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt;
 	if (hdr->flags & ISCSI_FLAG_CMD_READ) {
-		spin_lock_bh(&conn->sess->ttt_lock);
-		cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
-		if (cmd->targ_xfer_tag == 0xFFFFFFFF)
-			cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
-		spin_unlock_bh(&conn->sess->ttt_lock);
+		cmd->targ_xfer_tag = session_get_next_ttt(conn->sess);
 	} else if (hdr->flags & ISCSI_FLAG_CMD_WRITE)
 		cmd->targ_xfer_tag = 0xFFFFFFFF;
 	cmd->cmd_sn		= be32_to_cpu(hdr->cmdsn);
@@ -1998,6 +1994,7 @@ iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 	cmd->cmd_sn		= be32_to_cpu(hdr->cmdsn);
 	cmd->exp_stat_sn	= be32_to_cpu(hdr->exp_statsn);
 	cmd->data_direction	= DMA_NONE;
+	cmd->text_in_ptr	= NULL;
 
 	return 0;
 }
@@ -2011,9 +2008,13 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 	int cmdsn_ret;
 
 	if (!text_in) {
-		pr_err("Unable to locate text_in buffer for sendtargets"
-		       " discovery\n");
-		goto reject;
+		cmd->targ_xfer_tag = be32_to_cpu(hdr->ttt);
+		if (cmd->targ_xfer_tag == 0xFFFFFFFF) {
+			pr_err("Unable to locate text_in buffer for sendtargets"
+			       " discovery\n");
+			goto reject;
+		}
+		goto empty_sendtargets;
 	}
 	if (strncmp("SendTargets", text_in, 11) != 0) {
 		pr_err("Received Text Data that is not"
@@ -2040,6 +2041,7 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 	list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
 	spin_unlock_bh(&conn->cmd_lock);
 
+empty_sendtargets:
 	iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
 
 	if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
@@ -3047,11 +3049,7 @@ static int iscsit_send_r2t(
 	int_to_scsilun(cmd->se_cmd.orig_fe_lun,
 			(struct scsi_lun *)&hdr->lun);
 	hdr->itt		= cmd->init_task_tag;
-	spin_lock_bh(&conn->sess->ttt_lock);
-	r2t->targ_xfer_tag	= conn->sess->targ_xfer_tag++;
-	if (r2t->targ_xfer_tag == 0xFFFFFFFF)
-		r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++;
-	spin_unlock_bh(&conn->sess->ttt_lock);
+	r2t->targ_xfer_tag	= session_get_next_ttt(conn->sess);
 	hdr->ttt		= cpu_to_be32(r2t->targ_xfer_tag);
 	hdr->statsn		= cpu_to_be32(conn->stat_sn);
 	hdr->exp_cmdsn		= cpu_to_be32(conn->sess->exp_cmd_sn);
@@ -3393,7 +3391,8 @@ static bool iscsit_check_inaddr_any(struct iscsi_np *np)
 
 static int
 iscsit_build_sendtargets_response(struct iscsi_cmd *cmd,
-				  enum iscsit_transport_type network_transport)
+				  enum iscsit_transport_type network_transport,
+				  int skip_bytes, bool *completed)
 {
 	char *payload = NULL;
 	struct iscsi_conn *conn = cmd->conn;
@@ -3405,7 +3404,7 @@ iscsit_build_sendtargets_response(struct iscsi_cmd *cmd,
 	unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */
 	unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL;
 
-	buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength,
+	buffer_len = min(conn->conn_ops->MaxRecvDataSegmentLength,
 			 SENDTARGETS_BUF_LIMIT);
 
 	payload = kzalloc(buffer_len, GFP_KERNEL);
@@ -3484,9 +3483,16 @@ iscsit_build_sendtargets_response(struct iscsi_cmd *cmd,
 						end_of_buf = 1;
 						goto eob;
 					}
-					memcpy(payload + payload_len, buf, len);
-					payload_len += len;
-					target_name_printed = 1;
+
+					if (skip_bytes && len <= skip_bytes) {
+						skip_bytes -= len;
+					} else {
+						memcpy(payload + payload_len, buf, len);
+						payload_len += len;
+						target_name_printed = 1;
+						if (len > skip_bytes)
+							skip_bytes = 0;
+					}
 				}
 
 				len = sprintf(buf, "TargetAddress="
@@ -3502,15 +3508,24 @@ iscsit_build_sendtargets_response(struct iscsi_cmd *cmd,
 					end_of_buf = 1;
 					goto eob;
 				}
-				memcpy(payload + payload_len, buf, len);
-				payload_len += len;
+
+				if (skip_bytes && len <= skip_bytes) {
+					skip_bytes -= len;
+				} else {
+					memcpy(payload + payload_len, buf, len);
+					payload_len += len;
+					if (len > skip_bytes)
+						skip_bytes = 0;
+				}
 			}
 			spin_unlock(&tpg->tpg_np_lock);
 		}
 		spin_unlock(&tiqn->tiqn_tpg_lock);
 eob:
-		if (end_of_buf)
+		if (end_of_buf) {
+			*completed = false;
 			break;
+		}
 
 		if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE)
 			break;
@@ -3528,13 +3543,23 @@ iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
 		      enum iscsit_transport_type network_transport)
 {
 	int text_length, padding;
+	bool completed = true;
 
-	text_length = iscsit_build_sendtargets_response(cmd, network_transport);
+	text_length = iscsit_build_sendtargets_response(cmd, network_transport,
+							cmd->read_data_done,
+							&completed);
 	if (text_length < 0)
 		return text_length;
 
+	if (completed) {
+		hdr->flags |= ISCSI_FLAG_CMD_FINAL;
+	} else {
+		hdr->flags |= ISCSI_FLAG_TEXT_CONTINUE;
+		cmd->read_data_done += text_length;
+		if (cmd->targ_xfer_tag == 0xFFFFFFFF)
+			cmd->targ_xfer_tag = session_get_next_ttt(conn->sess);
+	}
 	hdr->opcode = ISCSI_OP_TEXT_RSP;
-	hdr->flags |= ISCSI_FLAG_CMD_FINAL;
 	padding = ((-text_length) & 3);
 	hton24(hdr->dlength, text_length);
 	hdr->itt = cmd->init_task_tag;
@@ -3543,21 +3568,25 @@ iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
 	hdr->statsn = cpu_to_be32(cmd->stat_sn);
 
 	iscsit_increment_maxcmdsn(cmd, conn->sess);
+	/*
+	 * Reset maxcmdsn_inc in multi-part text payload exchanges to
+	 * correctly increment MaxCmdSN for each response answering a
+	 * non immediate text request with a valid CmdSN.
+	 */
+	cmd->maxcmdsn_inc = 0;
 	hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
 	hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
 
-	pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
-		" Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn,
-		text_length, conn->cid);
+	pr_debug("Built Text Response: ITT: 0x%08x, TTT: 0x%08x, StatSN: 0x%08x,"
+		" Length: %u, CID: %hu F: %d C: %d\n", cmd->init_task_tag,
+		cmd->targ_xfer_tag, cmd->stat_sn, text_length, conn->cid,
+		!!(hdr->flags & ISCSI_FLAG_CMD_FINAL),
+		!!(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE));
 
 	return text_length + padding;
 }
 EXPORT_SYMBOL(iscsit_build_text_rsp);
 
-/*
- *	FIXME: Add support for F_BIT and C_BIT when the length is longer than
- *	MaxRecvDataSegmentLength.
- */
 static int iscsit_send_text_rsp(
 	struct iscsi_cmd *cmd,
 	struct iscsi_conn *conn)
@@ -4021,9 +4050,15 @@ static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf)
 		ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf);
 		break;
 	case ISCSI_OP_TEXT:
-		cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
-		if (!cmd)
-			goto reject;
+		if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) {
+			cmd = iscsit_find_cmd_from_itt(conn, hdr->itt);
+			if (!cmd)
+				goto reject;
+		} else {
+			cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE);
+			if (!cmd)
+				goto reject;
+		}
 
 		ret = iscsit_handle_text_cmd(conn, cmd, buf);
 		break;
diff --git a/drivers/target/iscsi/iscsi_target_auth.c b/drivers/target/iscsi/iscsi_target_auth.c
index ab4915c0d933..47e249dccb5f 100644
--- a/drivers/target/iscsi/iscsi_target_auth.c
+++ b/drivers/target/iscsi/iscsi_target_auth.c
@@ -22,7 +22,7 @@
 #include <linux/err.h>
 #include <linux/scatterlist.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_nego.h"
 #include "iscsi_target_auth.h"
 
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 9059c1e0b26e..48384b675e62 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -28,7 +28,7 @@
 #include <target/configfs_macros.h>
 #include <target/iscsi/iscsi_transport.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_parameters.h"
 #include "iscsi_target_device.h"
 #include "iscsi_target_erl0.h"
@@ -36,7 +36,7 @@
 #include "iscsi_target_tpg.h"
 #include "iscsi_target_util.h"
 #include "iscsi_target.h"
-#include "iscsi_target_stat.h"
+#include <target/iscsi/iscsi_target_stat.h>
 #include "iscsi_target_configfs.h"
 
 struct target_fabric_configfs *lio_target_fabric_configfs;
@@ -674,12 +674,9 @@ static ssize_t lio_target_nacl_show_info(
 		rb += sprintf(page+rb, "InitiatorAlias: %s\n",
 			sess->sess_ops->InitiatorAlias);
 
-		rb += sprintf(page+rb, "LIO Session ID: %u   "
-			"ISID: 0x%02x %02x %02x %02x %02x %02x  "
-			"TSIH: %hu  ", sess->sid,
-			sess->isid[0], sess->isid[1], sess->isid[2],
-			sess->isid[3], sess->isid[4], sess->isid[5],
-			sess->tsih);
+		rb += sprintf(page+rb,
+			      "LIO Session ID: %u   ISID: 0x%6ph  TSIH: %hu  ",
+			      sess->sid, sess->isid, sess->tsih);
 		rb += sprintf(page+rb, "SessionType: %s\n",
 				(sess->sess_ops->SessionType) ?
 				"Discovery" : "Normal");
@@ -1758,9 +1755,7 @@ static u32 lio_sess_get_initiator_sid(
 	/*
 	 * iSCSI Initiator Session Identifier from RFC-3720.
 	 */
-	return snprintf(buf, size, "%02x%02x%02x%02x%02x%02x",
-		sess->isid[0], sess->isid[1], sess->isid[2],
-		sess->isid[3], sess->isid[4], sess->isid[5]);
+	return snprintf(buf, size, "%6phN", sess->isid);
 }
 
 static int lio_queue_data_in(struct se_cmd *se_cmd)
diff --git a/drivers/target/iscsi/iscsi_target_datain_values.c b/drivers/target/iscsi/iscsi_target_datain_values.c
index e93d5a7a3f81..fb3b52b124ac 100644
--- a/drivers/target/iscsi/iscsi_target_datain_values.c
+++ b/drivers/target/iscsi/iscsi_target_datain_values.c
@@ -18,7 +18,7 @@
 
 #include <scsi/iscsi_proto.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_seq_pdu_list.h"
 #include "iscsi_target_erl1.h"
 #include "iscsi_target_util.h"
diff --git a/drivers/target/iscsi/iscsi_target_device.c b/drivers/target/iscsi/iscsi_target_device.c
index 7087c736daa5..34c3cd1b05ce 100644
--- a/drivers/target/iscsi/iscsi_target_device.c
+++ b/drivers/target/iscsi/iscsi_target_device.c
@@ -21,7 +21,7 @@
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_device.h"
 #include "iscsi_target_tpg.h"
 #include "iscsi_target_util.h"
diff --git a/drivers/target/iscsi/iscsi_target_erl0.c b/drivers/target/iscsi/iscsi_target_erl0.c
index a0ae5fc0ad75..1c197bad6132 100644
--- a/drivers/target/iscsi/iscsi_target_erl0.c
+++ b/drivers/target/iscsi/iscsi_target_erl0.c
@@ -21,7 +21,8 @@
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
+#include <target/iscsi/iscsi_transport.h>
 #include "iscsi_target_seq_pdu_list.h"
 #include "iscsi_target_tq.h"
 #include "iscsi_target_erl0.h"
@@ -939,7 +940,8 @@ void iscsit_take_action_for_connection_exit(struct iscsi_conn *conn)
 
 	if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) {
 		spin_unlock_bh(&conn->state_lock);
-		iscsit_close_connection(conn);
+		if (conn->conn_transport->transport_type == ISCSI_TCP)
+			iscsit_close_connection(conn);
 		return;
 	}
 
diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c
index cda4d80cfaef..2e561deb30a2 100644
--- a/drivers/target/iscsi/iscsi_target_erl1.c
+++ b/drivers/target/iscsi/iscsi_target_erl1.c
@@ -22,7 +22,7 @@
 #include <target/target_core_fabric.h>
 #include <target/iscsi/iscsi_transport.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_seq_pdu_list.h"
 #include "iscsi_target_datain_values.h"
 #include "iscsi_target_device.h"
diff --git a/drivers/target/iscsi/iscsi_target_erl2.c b/drivers/target/iscsi/iscsi_target_erl2.c
index 4ca8fd2a70db..e24f1c7c5862 100644
--- a/drivers/target/iscsi/iscsi_target_erl2.c
+++ b/drivers/target/iscsi/iscsi_target_erl2.c
@@ -21,7 +21,7 @@
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_datain_values.h"
 #include "iscsi_target_util.h"
 #include "iscsi_target_erl0.h"
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 713c0c1877ab..153fb66ac1b8 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -24,14 +24,14 @@
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
+#include <target/iscsi/iscsi_target_stat.h>
 #include "iscsi_target_tq.h"
 #include "iscsi_target_device.h"
 #include "iscsi_target_nego.h"
 #include "iscsi_target_erl0.h"
 #include "iscsi_target_erl2.h"
 #include "iscsi_target_login.h"
-#include "iscsi_target_stat.h"
 #include "iscsi_target_tpg.h"
 #include "iscsi_target_util.h"
 #include "iscsi_target.h"
diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index 62a095f36bf2..8c02fa34716f 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -22,7 +22,7 @@
 #include <target/target_core_fabric.h>
 #include <target/iscsi/iscsi_transport.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_parameters.h"
 #include "iscsi_target_login.h"
 #include "iscsi_target_nego.h"
diff --git a/drivers/target/iscsi/iscsi_target_nodeattrib.c b/drivers/target/iscsi/iscsi_target_nodeattrib.c
index 16454a922e2b..208cca8a363c 100644
--- a/drivers/target/iscsi/iscsi_target_nodeattrib.c
+++ b/drivers/target/iscsi/iscsi_target_nodeattrib.c
@@ -18,7 +18,7 @@
 
 #include <target/target_core_base.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_device.h"
 #include "iscsi_target_tpg.h"
 #include "iscsi_target_util.h"
diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c
index 18c29260b4a2..d4f9e9645697 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.c
+++ b/drivers/target/iscsi/iscsi_target_parameters.c
@@ -18,7 +18,7 @@
 
 #include <linux/slab.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_util.h"
 #include "iscsi_target_parameters.h"
 
diff --git a/drivers/target/iscsi/iscsi_target_seq_pdu_list.c b/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
index ca41b583f2f6..e446a09c886b 100644
--- a/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
+++ b/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
@@ -20,7 +20,7 @@
 #include <linux/slab.h>
 #include <linux/random.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_util.h"
 #include "iscsi_target_tpg.h"
 #include "iscsi_target_seq_pdu_list.h"
diff --git a/drivers/target/iscsi/iscsi_target_stat.c b/drivers/target/iscsi/iscsi_target_stat.c
index 103395510307..5e1349a3b143 100644
--- a/drivers/target/iscsi/iscsi_target_stat.c
+++ b/drivers/target/iscsi/iscsi_target_stat.c
@@ -23,12 +23,12 @@
 #include <target/target_core_base.h>
 #include <target/configfs_macros.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_parameters.h"
 #include "iscsi_target_device.h"
 #include "iscsi_target_tpg.h"
 #include "iscsi_target_util.h"
-#include "iscsi_target_stat.h"
+#include <target/iscsi/iscsi_target_stat.h>
 
 #ifndef INITIAL_JIFFIES
 #define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
diff --git a/drivers/target/iscsi/iscsi_target_tmr.c b/drivers/target/iscsi/iscsi_target_tmr.c
index 78404b1cc0bf..b0224a77e26d 100644
--- a/drivers/target/iscsi/iscsi_target_tmr.c
+++ b/drivers/target/iscsi/iscsi_target_tmr.c
@@ -23,7 +23,7 @@
 #include <target/target_core_fabric.h>
 #include <target/iscsi/iscsi_transport.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_seq_pdu_list.h"
 #include "iscsi_target_datain_values.h"
 #include "iscsi_target_device.h"
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 9053a3c0c6e5..bdd127c0e3ae 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -20,7 +20,7 @@
 #include <target/target_core_fabric.h>
 #include <target/target_core_configfs.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_erl0.h"
 #include "iscsi_target_login.h"
 #include "iscsi_target_nodeattrib.h"
diff --git a/drivers/target/iscsi/iscsi_target_tq.c b/drivers/target/iscsi/iscsi_target_tq.c
index 601e9cc61e98..26aa50996473 100644
--- a/drivers/target/iscsi/iscsi_target_tq.c
+++ b/drivers/target/iscsi/iscsi_target_tq.c
@@ -20,40 +20,26 @@
 #include <linux/list.h>
 #include <linux/bitmap.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_tq.h"
 #include "iscsi_target.h"
 
-static LIST_HEAD(active_ts_list);
 static LIST_HEAD(inactive_ts_list);
-static DEFINE_SPINLOCK(active_ts_lock);
 static DEFINE_SPINLOCK(inactive_ts_lock);
 static DEFINE_SPINLOCK(ts_bitmap_lock);
 
-static void iscsi_add_ts_to_active_list(struct iscsi_thread_set *ts)
-{
-	spin_lock(&active_ts_lock);
-	list_add_tail(&ts->ts_list, &active_ts_list);
-	iscsit_global->active_ts++;
-	spin_unlock(&active_ts_lock);
-}
-
 static void iscsi_add_ts_to_inactive_list(struct iscsi_thread_set *ts)
 {
+	if (!list_empty(&ts->ts_list)) {
+		WARN_ON(1);
+		return;
+	}
 	spin_lock(&inactive_ts_lock);
 	list_add_tail(&ts->ts_list, &inactive_ts_list);
 	iscsit_global->inactive_ts++;
 	spin_unlock(&inactive_ts_lock);
 }
 
-static void iscsi_del_ts_from_active_list(struct iscsi_thread_set *ts)
-{
-	spin_lock(&active_ts_lock);
-	list_del(&ts->ts_list);
-	iscsit_global->active_ts--;
-	spin_unlock(&active_ts_lock);
-}
-
 static struct iscsi_thread_set *iscsi_get_ts_from_inactive_list(void)
 {
 	struct iscsi_thread_set *ts;
@@ -66,7 +52,7 @@ static struct iscsi_thread_set *iscsi_get_ts_from_inactive_list(void)
 
 	ts = list_first_entry(&inactive_ts_list, struct iscsi_thread_set, ts_list);
 
-	list_del(&ts->ts_list);
+	list_del_init(&ts->ts_list);
 	iscsit_global->inactive_ts--;
 	spin_unlock(&inactive_ts_lock);
 
@@ -204,8 +190,6 @@ static void iscsi_deallocate_extra_thread_sets(void)
 
 void iscsi_activate_thread_set(struct iscsi_conn *conn, struct iscsi_thread_set *ts)
 {
-	iscsi_add_ts_to_active_list(ts);
-
 	spin_lock_bh(&ts->ts_state_lock);
 	conn->thread_set = ts;
 	ts->conn = conn;
@@ -397,7 +381,6 @@ struct iscsi_conn *iscsi_rx_thread_pre_handler(struct iscsi_thread_set *ts)
 
 	if (ts->delay_inactive && (--ts->thread_count == 0)) {
 		spin_unlock_bh(&ts->ts_state_lock);
-		iscsi_del_ts_from_active_list(ts);
 
 		if (!iscsit_global->in_shutdown)
 			iscsi_deallocate_extra_thread_sets();
@@ -452,7 +435,6 @@ struct iscsi_conn *iscsi_tx_thread_pre_handler(struct iscsi_thread_set *ts)
 
 	if (ts->delay_inactive && (--ts->thread_count == 0)) {
 		spin_unlock_bh(&ts->ts_state_lock);
-		iscsi_del_ts_from_active_list(ts);
 
 		if (!iscsit_global->in_shutdown)
 			iscsi_deallocate_extra_thread_sets();
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index bcd88ec99793..390df8ed72b2 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -25,7 +25,7 @@
 #include <target/target_core_configfs.h>
 #include <target/iscsi/iscsi_transport.h>
 
-#include "iscsi_target_core.h"
+#include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_parameters.h"
 #include "iscsi_target_seq_pdu_list.h"
 #include "iscsi_target_datain_values.h"
@@ -390,6 +390,7 @@ struct iscsi_cmd *iscsit_find_cmd_from_itt(
 			init_task_tag, conn->cid);
 	return NULL;
 }
+EXPORT_SYMBOL(iscsit_find_cmd_from_itt);
 
 struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(
 	struct iscsi_conn *conn,
@@ -939,13 +940,8 @@ static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
 	state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE :
 				ISTATE_SEND_NOPIN_NO_RESPONSE;
 	cmd->init_task_tag = RESERVED_ITT;
-	spin_lock_bh(&conn->sess->ttt_lock);
-	cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ :
-			0xFFFFFFFF;
-	if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF))
-		cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
-	spin_unlock_bh(&conn->sess->ttt_lock);
-
+	cmd->targ_xfer_tag = (want_response) ?
+			     session_get_next_ttt(conn->sess) : 0xFFFFFFFF;
 	spin_lock_bh(&conn->cmd_lock);
 	list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
 	spin_unlock_bh(&conn->cmd_lock);
diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h
index a68508c4fec8..1ab754a671ff 100644
--- a/drivers/target/iscsi/iscsi_target_util.h
+++ b/drivers/target/iscsi/iscsi_target_util.h
@@ -16,7 +16,6 @@ extern struct iscsi_r2t *iscsit_get_holder_for_r2tsn(struct iscsi_cmd *, u32);
 extern int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 			       unsigned char * ,__be32 cmdsn);
 extern int iscsit_check_unsolicited_dataout(struct iscsi_cmd *, unsigned char *);
-extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
 extern struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(struct iscsi_conn *,
 			itt_t, u32);
 extern struct iscsi_cmd *iscsit_find_cmd_from_ttt(struct iscsi_conn *, u32);
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index d836de200a03..44620fb6bd45 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -494,6 +494,11 @@ fd_execute_write_same(struct se_cmd *cmd)
 		target_complete_cmd(cmd, SAM_STAT_GOOD);
 		return 0;
 	}
+	if (cmd->prot_op) {
+		pr_err("WRITE_SAME: Protection information with FILEIO"
+		       " backends not supported\n");
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	}
 	sg = &cmd->t_data_sg[0];
 
 	if (cmd->t_data_nents > 1 ||
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 78346b850968..d4a4b0fb444a 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -464,6 +464,11 @@ iblock_execute_write_same(struct se_cmd *cmd)
 	sector_t block_lba = cmd->t_task_lba;
 	sector_t sectors = sbc_get_write_same_sectors(cmd);
 
+	if (cmd->prot_op) {
+		pr_err("WRITE_SAME: Protection information with IBLOCK"
+		       " backends not supported\n");
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	}
 	sg = &cmd->t_data_sg[0];
 
 	if (cmd->t_data_nents > 1 ||
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 283cf786ef98..2de6fb8cee8d 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -1874,8 +1874,8 @@ static int core_scsi3_update_aptpl_buf(
 		}
 
 		if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
-			pr_err("Unable to update renaming"
-				" APTPL metadata\n");
+			pr_err("Unable to update renaming APTPL metadata,"
+			       " reallocating larger buffer\n");
 			ret = -EMSGSIZE;
 			goto out;
 		}
@@ -1892,8 +1892,8 @@ static int core_scsi3_update_aptpl_buf(
 			lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count);
 
 		if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
-			pr_err("Unable to update renaming"
-				" APTPL metadata\n");
+			pr_err("Unable to update renaming APTPL metadata,"
+			       " reallocating larger buffer\n");
 			ret = -EMSGSIZE;
 			goto out;
 		}
@@ -1956,7 +1956,7 @@ static int __core_scsi3_write_aptpl_to_file(
 static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl)
 {
 	unsigned char *buf;
-	int rc;
+	int rc, len = PR_APTPL_BUF_LEN;
 
 	if (!aptpl) {
 		char *null_buf = "No Registrations or Reservations\n";
@@ -1970,25 +1970,26 @@ static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, b
 
 		return 0;
 	}
-
-	buf = kzalloc(PR_APTPL_BUF_LEN, GFP_KERNEL);
+retry:
+	buf = vzalloc(len);
 	if (!buf)
 		return TCM_OUT_OF_RESOURCES;
 
-	rc = core_scsi3_update_aptpl_buf(dev, buf, PR_APTPL_BUF_LEN);
+	rc = core_scsi3_update_aptpl_buf(dev, buf, len);
 	if (rc < 0) {
-		kfree(buf);
-		return TCM_OUT_OF_RESOURCES;
+		vfree(buf);
+		len *= 2;
+		goto retry;
 	}
 
 	rc = __core_scsi3_write_aptpl_to_file(dev, buf);
 	if (rc != 0) {
 		pr_err("SPC-3 PR: Could not update APTPL\n");
-		kfree(buf);
+		vfree(buf);
 		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	dev->t10_pr.pr_aptpl_active = 1;
-	kfree(buf);
+	vfree(buf);
 	pr_debug("SPC-3 PR: Set APTPL Bit Activated\n");
 	return 0;
 }
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index cd4bed7b2757..9a2f9d3a6e70 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -37,6 +37,9 @@
 #include "target_core_alua.h"
 
 static sense_reason_t
+sbc_check_prot(struct se_device *, struct se_cmd *, unsigned char *, u32, bool);
+
+static sense_reason_t
 sbc_emulate_readcapacity(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
@@ -251,7 +254,10 @@ static inline unsigned long long transport_lba_64_ext(unsigned char *cdb)
 static sense_reason_t
 sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *ops)
 {
+	struct se_device *dev = cmd->se_dev;
+	sector_t end_lba = dev->transport->get_blocks(dev) + 1;
 	unsigned int sectors = sbc_get_write_same_sectors(cmd);
+	sense_reason_t ret;
 
 	if ((flags[0] & 0x04) || (flags[0] & 0x02)) {
 		pr_err("WRITE_SAME PBDATA and LBDATA"
@@ -264,6 +270,16 @@ sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *o
 			sectors, cmd->se_dev->dev_attrib.max_write_same_len);
 		return TCM_INVALID_CDB_FIELD;
 	}
+	/*
+	 * Sanity check for LBA wrap and request past end of device.
+	 */
+	if (((cmd->t_task_lba + sectors) < cmd->t_task_lba) ||
+	    ((cmd->t_task_lba + sectors) > end_lba)) {
+		pr_err("WRITE_SAME exceeds last lba %llu (lba %llu, sectors %u)\n",
+		       (unsigned long long)end_lba, cmd->t_task_lba, sectors);
+		return TCM_ADDRESS_OUT_OF_RANGE;
+	}
+
 	/* We always have ANC_SUP == 0 so setting ANCHOR is always an error */
 	if (flags[0] & 0x10) {
 		pr_warn("WRITE SAME with ANCHOR not supported\n");
@@ -277,12 +293,21 @@ sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *o
 		if (!ops->execute_write_same_unmap)
 			return TCM_UNSUPPORTED_SCSI_OPCODE;
 
+		if (!dev->dev_attrib.emulate_tpws) {
+			pr_err("Got WRITE_SAME w/ UNMAP=1, but backend device"
+			       " has emulate_tpws disabled\n");
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		}
 		cmd->execute_cmd = ops->execute_write_same_unmap;
 		return 0;
 	}
 	if (!ops->execute_write_same)
 		return TCM_UNSUPPORTED_SCSI_OPCODE;
 
+	ret = sbc_check_prot(dev, cmd, &cmd->t_task_cdb[0], sectors, true);
+	if (ret)
+		return ret;
+
 	cmd->execute_cmd = ops->execute_write_same;
 	return 0;
 }
@@ -614,14 +639,21 @@ sbc_set_prot_op_checks(u8 protect, enum target_prot_type prot_type,
 	return 0;
 }
 
-static bool
+static sense_reason_t
 sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb,
 	       u32 sectors, bool is_write)
 {
 	u8 protect = cdb[1] >> 5;
 
-	if ((!cmd->t_prot_sg || !cmd->t_prot_nents) && cmd->prot_pto)
-		return true;
+	if (!cmd->t_prot_sg || !cmd->t_prot_nents) {
+		if (protect && !dev->dev_attrib.pi_prot_type) {
+			pr_err("CDB contains protect bit, but device does not"
+			       " advertise PROTECT=1 feature bit\n");
+			return TCM_INVALID_CDB_FIELD;
+		}
+		if (cmd->prot_pto)
+			return TCM_NO_SENSE;
+	}
 
 	switch (dev->dev_attrib.pi_prot_type) {
 	case TARGET_DIF_TYPE3_PROT:
@@ -629,7 +661,7 @@ sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb,
 		break;
 	case TARGET_DIF_TYPE2_PROT:
 		if (protect)
-			return false;
+			return TCM_INVALID_CDB_FIELD;
 
 		cmd->reftag_seed = cmd->t_task_lba;
 		break;
@@ -638,12 +670,12 @@ sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb,
 		break;
 	case TARGET_DIF_TYPE0_PROT:
 	default:
-		return true;
+		return TCM_NO_SENSE;
 	}
 
 	if (sbc_set_prot_op_checks(protect, dev->dev_attrib.pi_prot_type,
 				   is_write, cmd))
-		return false;
+		return TCM_INVALID_CDB_FIELD;
 
 	cmd->prot_type = dev->dev_attrib.pi_prot_type;
 	cmd->prot_length = dev->prot_length * sectors;
@@ -662,7 +694,30 @@ sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb,
 		 __func__, cmd->prot_type, cmd->data_length, cmd->prot_length,
 		 cmd->prot_op, cmd->prot_checks);
 
-	return true;
+	return TCM_NO_SENSE;
+}
+
+static int
+sbc_check_dpofua(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb)
+{
+	if (cdb[1] & 0x10) {
+		if (!dev->dev_attrib.emulate_dpo) {
+			pr_err("Got CDB: 0x%02x with DPO bit set, but device"
+			       " does not advertise support for DPO\n", cdb[0]);
+			return -EINVAL;
+		}
+	}
+	if (cdb[1] & 0x8) {
+		if (!dev->dev_attrib.emulate_fua_write ||
+		    !dev->dev_attrib.emulate_write_cache) {
+			pr_err("Got CDB: 0x%02x with FUA bit set, but device"
+			       " does not advertise support for FUA write\n",
+			       cdb[0]);
+			return -EINVAL;
+		}
+		cmd->se_cmd_flags |= SCF_FUA;
+	}
+	return 0;
 }
 
 sense_reason_t
@@ -686,8 +741,12 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		sectors = transport_get_sectors_10(cdb);
 		cmd->t_task_lba = transport_lba_32(cdb);
 
-		if (!sbc_check_prot(dev, cmd, cdb, sectors, false))
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
+		ret = sbc_check_prot(dev, cmd, cdb, sectors, false);
+		if (ret)
+			return ret;
 
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 		cmd->execute_rw = ops->execute_rw;
@@ -697,8 +756,12 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		sectors = transport_get_sectors_12(cdb);
 		cmd->t_task_lba = transport_lba_32(cdb);
 
-		if (!sbc_check_prot(dev, cmd, cdb, sectors, false))
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
+		ret = sbc_check_prot(dev, cmd, cdb, sectors, false);
+		if (ret)
+			return ret;
 
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 		cmd->execute_rw = ops->execute_rw;
@@ -708,8 +771,12 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		sectors = transport_get_sectors_16(cdb);
 		cmd->t_task_lba = transport_lba_64(cdb);
 
-		if (!sbc_check_prot(dev, cmd, cdb, sectors, false))
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
+		ret = sbc_check_prot(dev, cmd, cdb, sectors, false);
+		if (ret)
+			return ret;
 
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 		cmd->execute_rw = ops->execute_rw;
@@ -727,11 +794,13 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		sectors = transport_get_sectors_10(cdb);
 		cmd->t_task_lba = transport_lba_32(cdb);
 
-		if (!sbc_check_prot(dev, cmd, cdb, sectors, true))
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
+		ret = sbc_check_prot(dev, cmd, cdb, sectors, true);
+		if (ret)
+			return ret;
 
-		if (cdb[1] & 0x8)
-			cmd->se_cmd_flags |= SCF_FUA;
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 		cmd->execute_rw = ops->execute_rw;
 		cmd->execute_cmd = sbc_execute_rw;
@@ -740,11 +809,13 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		sectors = transport_get_sectors_12(cdb);
 		cmd->t_task_lba = transport_lba_32(cdb);
 
-		if (!sbc_check_prot(dev, cmd, cdb, sectors, true))
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
+		ret = sbc_check_prot(dev, cmd, cdb, sectors, true);
+		if (ret)
+			return ret;
 
-		if (cdb[1] & 0x8)
-			cmd->se_cmd_flags |= SCF_FUA;
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 		cmd->execute_rw = ops->execute_rw;
 		cmd->execute_cmd = sbc_execute_rw;
@@ -753,11 +824,13 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		sectors = transport_get_sectors_16(cdb);
 		cmd->t_task_lba = transport_lba_64(cdb);
 
-		if (!sbc_check_prot(dev, cmd, cdb, sectors, true))
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
+		ret = sbc_check_prot(dev, cmd, cdb, sectors, true);
+		if (ret)
+			return ret;
 
-		if (cdb[1] & 0x8)
-			cmd->se_cmd_flags |= SCF_FUA;
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 		cmd->execute_rw = ops->execute_rw;
 		cmd->execute_cmd = sbc_execute_rw;
@@ -768,6 +841,9 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 			return TCM_INVALID_CDB_FIELD;
 		sectors = transport_get_sectors_10(cdb);
 
+		if (sbc_check_dpofua(dev, cmd, cdb))
+			return TCM_INVALID_CDB_FIELD;
+
 		cmd->t_task_lba = transport_lba_32(cdb);
 		cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
 
@@ -777,8 +853,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		cmd->execute_rw = ops->execute_rw;
 		cmd->execute_cmd = sbc_execute_rw;
 		cmd->transport_complete_callback = &xdreadwrite_callback;
-		if (cdb[1] & 0x8)
-			cmd->se_cmd_flags |= SCF_FUA;
 		break;
 	case VARIABLE_LENGTH_CMD:
 	{
@@ -787,6 +861,8 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		case XDWRITEREAD_32:
 			sectors = transport_get_sectors_32(cdb);
 
+			if (sbc_check_dpofua(dev, cmd, cdb))
+				return TCM_INVALID_CDB_FIELD;
 			/*
 			 * Use WRITE_32 and READ_32 opcodes for the emulated
 			 * XDWRITE_READ_32 logic.
@@ -801,8 +877,6 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 			cmd->execute_rw = ops->execute_rw;
 			cmd->execute_cmd = sbc_execute_rw;
 			cmd->transport_complete_callback = &xdreadwrite_callback;
-			if (cdb[1] & 0x8)
-				cmd->se_cmd_flags |= SCF_FUA;
 			break;
 		case WRITE_SAME_32:
 			sectors = transport_get_sectors_32(cdb);
@@ -888,6 +962,11 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		if (!ops->execute_unmap)
 			return TCM_UNSUPPORTED_SCSI_OPCODE;
 
+		if (!dev->dev_attrib.emulate_tpu) {
+			pr_err("Got UNMAP, but backend device has"
+			       " emulate_tpu disabled\n");
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		}
 		size = get_unaligned_be16(&cdb[7]);
 		cmd->execute_cmd = ops->execute_unmap;
 		break;
@@ -955,7 +1034,8 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		unsigned long long end_lba;
 check_lba:
 		end_lba = dev->transport->get_blocks(dev) + 1;
-		if (cmd->t_task_lba + sectors > end_lba) {
+		if (((cmd->t_task_lba + sectors) < cmd->t_task_lba) ||
+		    ((cmd->t_task_lba + sectors) > end_lba)) {
 			pr_err("cmd exceeds last lba %llu "
 				"(lba %llu, sectors %u)\n",
 				end_lba, cmd->t_task_lba, sectors);
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 4c71657da56a..460e93109473 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -647,7 +647,7 @@ spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 	 * support the use of the WRITE SAME (16) command to unmap LBAs.
 	 */
 	if (dev->dev_attrib.emulate_tpws != 0)
-		buf[5] |= 0x40;
+		buf[5] |= 0x40 | 0x20;
 
 	return 0;
 }
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index dc78d87e0fc2..8d4f3f1ff799 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -38,7 +38,6 @@
 #include <linux/miscdevice.h>
 #include <asm/unaligned.h>
 #include <scsi/scsi.h>
-#include <scsi/scsi_tcq.h>
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 #include <target/target_core_fabric_configfs.h>
@@ -52,13 +51,13 @@
 
 #include "vhost.h"
 
-#define TCM_VHOST_VERSION  "v0.1"
-#define TCM_VHOST_NAMELEN 256
-#define TCM_VHOST_MAX_CDB_SIZE 32
-#define TCM_VHOST_DEFAULT_TAGS 256
-#define TCM_VHOST_PREALLOC_SGLS 2048
-#define TCM_VHOST_PREALLOC_UPAGES 2048
-#define TCM_VHOST_PREALLOC_PROT_SGLS 512
+#define VHOST_SCSI_VERSION  "v0.1"
+#define VHOST_SCSI_NAMELEN 256
+#define VHOST_SCSI_MAX_CDB_SIZE 32
+#define VHOST_SCSI_DEFAULT_TAGS 256
+#define VHOST_SCSI_PREALLOC_SGLS 2048
+#define VHOST_SCSI_PREALLOC_UPAGES 2048
+#define VHOST_SCSI_PREALLOC_PROT_SGLS 512
 
 struct vhost_scsi_inflight {
 	/* Wait for the flush operation to finish */
@@ -67,11 +66,13 @@ struct vhost_scsi_inflight {
 	struct kref kref;
 };
 
-struct tcm_vhost_cmd {
+struct vhost_scsi_cmd {
 	/* Descriptor from vhost_get_vq_desc() for virt_queue segment */
 	int tvc_vq_desc;
 	/* virtio-scsi initiator task attribute */
 	int tvc_task_attr;
+	/* virtio-scsi response incoming iovecs */
+	int tvc_in_iovs;
 	/* virtio-scsi initiator data direction */
 	enum dma_data_direction tvc_data_direction;
 	/* Expected data transfer length from virtio-scsi header */
@@ -81,26 +82,26 @@ struct tcm_vhost_cmd {
 	/* The number of scatterlists associated with this cmd */
 	u32 tvc_sgl_count;
 	u32 tvc_prot_sgl_count;
-	/* Saved unpacked SCSI LUN for tcm_vhost_submission_work() */
+	/* Saved unpacked SCSI LUN for vhost_scsi_submission_work() */
 	u32 tvc_lun;
 	/* Pointer to the SGL formatted memory from virtio-scsi */
 	struct scatterlist *tvc_sgl;
 	struct scatterlist *tvc_prot_sgl;
 	struct page **tvc_upages;
-	/* Pointer to response */
-	struct virtio_scsi_cmd_resp __user *tvc_resp;
+	/* Pointer to response header iovec */
+	struct iovec *tvc_resp_iov;
 	/* Pointer to vhost_scsi for our device */
 	struct vhost_scsi *tvc_vhost;
 	/* Pointer to vhost_virtqueue for the cmd */
 	struct vhost_virtqueue *tvc_vq;
 	/* Pointer to vhost nexus memory */
-	struct tcm_vhost_nexus *tvc_nexus;
+	struct vhost_scsi_nexus *tvc_nexus;
 	/* The TCM I/O descriptor that is accessed via container_of() */
 	struct se_cmd tvc_se_cmd;
-	/* work item used for cmwq dispatch to tcm_vhost_submission_work() */
+	/* work item used for cmwq dispatch to vhost_scsi_submission_work() */
 	struct work_struct work;
 	/* Copy of the incoming SCSI command descriptor block (CDB) */
-	unsigned char tvc_cdb[TCM_VHOST_MAX_CDB_SIZE];
+	unsigned char tvc_cdb[VHOST_SCSI_MAX_CDB_SIZE];
 	/* Sense buffer that will be mapped into outgoing status */
 	unsigned char tvc_sense_buf[TRANSPORT_SENSE_BUFFER];
 	/* Completed commands list, serviced from vhost worker thread */
@@ -109,53 +110,53 @@ struct tcm_vhost_cmd {
 	struct vhost_scsi_inflight *inflight;
 };
 
-struct tcm_vhost_nexus {
+struct vhost_scsi_nexus {
 	/* Pointer to TCM session for I_T Nexus */
 	struct se_session *tvn_se_sess;
 };
 
-struct tcm_vhost_nacl {
+struct vhost_scsi_nacl {
 	/* Binary World Wide unique Port Name for Vhost Initiator port */
 	u64 iport_wwpn;
 	/* ASCII formatted WWPN for Sas Initiator port */
-	char iport_name[TCM_VHOST_NAMELEN];
-	/* Returned by tcm_vhost_make_nodeacl() */
+	char iport_name[VHOST_SCSI_NAMELEN];
+	/* Returned by vhost_scsi_make_nodeacl() */
 	struct se_node_acl se_node_acl;
 };
 
-struct tcm_vhost_tpg {
+struct vhost_scsi_tpg {
 	/* Vhost port target portal group tag for TCM */
 	u16 tport_tpgt;
 	/* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */
 	int tv_tpg_port_count;
 	/* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */
 	int tv_tpg_vhost_count;
-	/* list for tcm_vhost_list */
+	/* list for vhost_scsi_list */
 	struct list_head tv_tpg_list;
 	/* Used to protect access for tpg_nexus */
 	struct mutex tv_tpg_mutex;
 	/* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */
-	struct tcm_vhost_nexus *tpg_nexus;
-	/* Pointer back to tcm_vhost_tport */
-	struct tcm_vhost_tport *tport;
-	/* Returned by tcm_vhost_make_tpg() */
+	struct vhost_scsi_nexus *tpg_nexus;
+	/* Pointer back to vhost_scsi_tport */
+	struct vhost_scsi_tport *tport;
+	/* Returned by vhost_scsi_make_tpg() */
 	struct se_portal_group se_tpg;
 	/* Pointer back to vhost_scsi, protected by tv_tpg_mutex */
 	struct vhost_scsi *vhost_scsi;
 };
 
-struct tcm_vhost_tport {
+struct vhost_scsi_tport {
 	/* SCSI protocol the tport is providing */
 	u8 tport_proto_id;
 	/* Binary World Wide unique Port Name for Vhost Target port */
 	u64 tport_wwpn;
 	/* ASCII formatted WWPN for Vhost Target port */
-	char tport_name[TCM_VHOST_NAMELEN];
-	/* Returned by tcm_vhost_make_tport() */
+	char tport_name[VHOST_SCSI_NAMELEN];
+	/* Returned by vhost_scsi_make_tport() */
 	struct se_wwn tport_wwn;
 };
 
-struct tcm_vhost_evt {
+struct vhost_scsi_evt {
 	/* event to be sent to guest */
 	struct virtio_scsi_event event;
 	/* event list, serviced from vhost worker thread */
@@ -171,7 +172,9 @@ enum {
 /* Note: can't set VIRTIO_F_VERSION_1 yet, since that implies ANY_LAYOUT. */
 enum {
 	VHOST_SCSI_FEATURES = VHOST_FEATURES | (1ULL << VIRTIO_SCSI_F_HOTPLUG) |
-					       (1ULL << VIRTIO_SCSI_F_T10_PI)
+					       (1ULL << VIRTIO_SCSI_F_T10_PI) |
+					       (1ULL << VIRTIO_F_ANY_LAYOUT) |
+					       (1ULL << VIRTIO_F_VERSION_1)
 };
 
 #define VHOST_SCSI_MAX_TARGET	256
@@ -195,7 +198,7 @@ struct vhost_scsi_virtqueue {
 
 struct vhost_scsi {
 	/* Protected by vhost_scsi->dev.mutex */
-	struct tcm_vhost_tpg **vs_tpg;
+	struct vhost_scsi_tpg **vs_tpg;
 	char vs_vhost_wwpn[TRANSPORT_IQN_LEN];
 
 	struct vhost_dev dev;
@@ -212,21 +215,21 @@ struct vhost_scsi {
 };
 
 /* Local pointer to allocated TCM configfs fabric module */
-static struct target_fabric_configfs *tcm_vhost_fabric_configfs;
+static struct target_fabric_configfs *vhost_scsi_fabric_configfs;
 
-static struct workqueue_struct *tcm_vhost_workqueue;
+static struct workqueue_struct *vhost_scsi_workqueue;
 
-/* Global spinlock to protect tcm_vhost TPG list for vhost IOCTL access */
-static DEFINE_MUTEX(tcm_vhost_mutex);
-static LIST_HEAD(tcm_vhost_list);
+/* Global spinlock to protect vhost_scsi TPG list for vhost IOCTL access */
+static DEFINE_MUTEX(vhost_scsi_mutex);
+static LIST_HEAD(vhost_scsi_list);
 
-static int iov_num_pages(struct iovec *iov)
+static int iov_num_pages(void __user *iov_base, size_t iov_len)
 {
-	return (PAGE_ALIGN((unsigned long)iov->iov_base + iov->iov_len) -
-	       ((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT;
+	return (PAGE_ALIGN((unsigned long)iov_base + iov_len) -
+	       ((unsigned long)iov_base & PAGE_MASK)) >> PAGE_SHIFT;
 }
 
-static void tcm_vhost_done_inflight(struct kref *kref)
+static void vhost_scsi_done_inflight(struct kref *kref)
 {
 	struct vhost_scsi_inflight *inflight;
 
@@ -234,7 +237,7 @@ static void tcm_vhost_done_inflight(struct kref *kref)
 	complete(&inflight->comp);
 }
 
-static void tcm_vhost_init_inflight(struct vhost_scsi *vs,
+static void vhost_scsi_init_inflight(struct vhost_scsi *vs,
 				    struct vhost_scsi_inflight *old_inflight[])
 {
 	struct vhost_scsi_inflight *new_inflight;
@@ -262,7 +265,7 @@ static void tcm_vhost_init_inflight(struct vhost_scsi *vs,
 }
 
 static struct vhost_scsi_inflight *
-tcm_vhost_get_inflight(struct vhost_virtqueue *vq)
+vhost_scsi_get_inflight(struct vhost_virtqueue *vq)
 {
 	struct vhost_scsi_inflight *inflight;
 	struct vhost_scsi_virtqueue *svq;
@@ -274,31 +277,31 @@ tcm_vhost_get_inflight(struct vhost_virtqueue *vq)
 	return inflight;
 }
 
-static void tcm_vhost_put_inflight(struct vhost_scsi_inflight *inflight)
+static void vhost_scsi_put_inflight(struct vhost_scsi_inflight *inflight)
 {
-	kref_put(&inflight->kref, tcm_vhost_done_inflight);
+	kref_put(&inflight->kref, vhost_scsi_done_inflight);
 }
 
-static int tcm_vhost_check_true(struct se_portal_group *se_tpg)
+static int vhost_scsi_check_true(struct se_portal_group *se_tpg)
 {
 	return 1;
 }
 
-static int tcm_vhost_check_false(struct se_portal_group *se_tpg)
+static int vhost_scsi_check_false(struct se_portal_group *se_tpg)
 {
 	return 0;
 }
 
-static char *tcm_vhost_get_fabric_name(void)
+static char *vhost_scsi_get_fabric_name(void)
 {
 	return "vhost";
 }
 
-static u8 tcm_vhost_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+static u8 vhost_scsi_get_fabric_proto_ident(struct se_portal_group *se_tpg)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_tport *tport = tpg->tport;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_tport *tport = tpg->tport;
 
 	switch (tport->tport_proto_id) {
 	case SCSI_PROTOCOL_SAS:
@@ -316,37 +319,37 @@ static u8 tcm_vhost_get_fabric_proto_ident(struct se_portal_group *se_tpg)
 	return sas_get_fabric_proto_ident(se_tpg);
 }
 
-static char *tcm_vhost_get_fabric_wwn(struct se_portal_group *se_tpg)
+static char *vhost_scsi_get_fabric_wwn(struct se_portal_group *se_tpg)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_tport *tport = tpg->tport;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_tport *tport = tpg->tport;
 
 	return &tport->tport_name[0];
 }
 
-static u16 tcm_vhost_get_tag(struct se_portal_group *se_tpg)
+static u16 vhost_scsi_get_tpgt(struct se_portal_group *se_tpg)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
 	return tpg->tport_tpgt;
 }
 
-static u32 tcm_vhost_get_default_depth(struct se_portal_group *se_tpg)
+static u32 vhost_scsi_get_default_depth(struct se_portal_group *se_tpg)
 {
 	return 1;
 }
 
 static u32
-tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg,
+vhost_scsi_get_pr_transport_id(struct se_portal_group *se_tpg,
 			      struct se_node_acl *se_nacl,
 			      struct t10_pr_registration *pr_reg,
 			      int *format_code,
 			      unsigned char *buf)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_tport *tport = tpg->tport;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_tport *tport = tpg->tport;
 
 	switch (tport->tport_proto_id) {
 	case SCSI_PROTOCOL_SAS:
@@ -369,14 +372,14 @@ tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg,
 }
 
 static u32
-tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg,
+vhost_scsi_get_pr_transport_id_len(struct se_portal_group *se_tpg,
 				  struct se_node_acl *se_nacl,
 				  struct t10_pr_registration *pr_reg,
 				  int *format_code)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_tport *tport = tpg->tport;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_tport *tport = tpg->tport;
 
 	switch (tport->tport_proto_id) {
 	case SCSI_PROTOCOL_SAS:
@@ -399,14 +402,14 @@ tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg,
 }
 
 static char *
-tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg,
+vhost_scsi_parse_pr_out_transport_id(struct se_portal_group *se_tpg,
 				    const char *buf,
 				    u32 *out_tid_len,
 				    char **port_nexus_ptr)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_tport *tport = tpg->tport;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_tport *tport = tpg->tport;
 
 	switch (tport->tport_proto_id) {
 	case SCSI_PROTOCOL_SAS:
@@ -429,13 +432,13 @@ tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg,
 }
 
 static struct se_node_acl *
-tcm_vhost_alloc_fabric_acl(struct se_portal_group *se_tpg)
+vhost_scsi_alloc_fabric_acl(struct se_portal_group *se_tpg)
 {
-	struct tcm_vhost_nacl *nacl;
+	struct vhost_scsi_nacl *nacl;
 
-	nacl = kzalloc(sizeof(struct tcm_vhost_nacl), GFP_KERNEL);
+	nacl = kzalloc(sizeof(struct vhost_scsi_nacl), GFP_KERNEL);
 	if (!nacl) {
-		pr_err("Unable to allocate struct tcm_vhost_nacl\n");
+		pr_err("Unable to allocate struct vhost_scsi_nacl\n");
 		return NULL;
 	}
 
@@ -443,24 +446,24 @@ tcm_vhost_alloc_fabric_acl(struct se_portal_group *se_tpg)
 }
 
 static void
-tcm_vhost_release_fabric_acl(struct se_portal_group *se_tpg,
+vhost_scsi_release_fabric_acl(struct se_portal_group *se_tpg,
 			     struct se_node_acl *se_nacl)
 {
-	struct tcm_vhost_nacl *nacl = container_of(se_nacl,
-			struct tcm_vhost_nacl, se_node_acl);
+	struct vhost_scsi_nacl *nacl = container_of(se_nacl,
+			struct vhost_scsi_nacl, se_node_acl);
 	kfree(nacl);
 }
 
-static u32 tcm_vhost_tpg_get_inst_index(struct se_portal_group *se_tpg)
+static u32 vhost_scsi_tpg_get_inst_index(struct se_portal_group *se_tpg)
 {
 	return 1;
 }
 
-static void tcm_vhost_release_cmd(struct se_cmd *se_cmd)
+static void vhost_scsi_release_cmd(struct se_cmd *se_cmd)
 {
-	struct tcm_vhost_cmd *tv_cmd = container_of(se_cmd,
-				struct tcm_vhost_cmd, tvc_se_cmd);
-	struct se_session *se_sess = se_cmd->se_sess;
+	struct vhost_scsi_cmd *tv_cmd = container_of(se_cmd,
+				struct vhost_scsi_cmd, tvc_se_cmd);
+	struct se_session *se_sess = tv_cmd->tvc_nexus->tvn_se_sess;
 	int i;
 
 	if (tv_cmd->tvc_sgl_count) {
@@ -472,53 +475,53 @@ static void tcm_vhost_release_cmd(struct se_cmd *se_cmd)
 			put_page(sg_page(&tv_cmd->tvc_prot_sgl[i]));
 	}
 
-	tcm_vhost_put_inflight(tv_cmd->inflight);
+	vhost_scsi_put_inflight(tv_cmd->inflight);
 	percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag);
 }
 
-static int tcm_vhost_shutdown_session(struct se_session *se_sess)
+static int vhost_scsi_shutdown_session(struct se_session *se_sess)
 {
 	return 0;
 }
 
-static void tcm_vhost_close_session(struct se_session *se_sess)
+static void vhost_scsi_close_session(struct se_session *se_sess)
 {
 	return;
 }
 
-static u32 tcm_vhost_sess_get_index(struct se_session *se_sess)
+static u32 vhost_scsi_sess_get_index(struct se_session *se_sess)
 {
 	return 0;
 }
 
-static int tcm_vhost_write_pending(struct se_cmd *se_cmd)
+static int vhost_scsi_write_pending(struct se_cmd *se_cmd)
 {
 	/* Go ahead and process the write immediately */
 	target_execute_cmd(se_cmd);
 	return 0;
 }
 
-static int tcm_vhost_write_pending_status(struct se_cmd *se_cmd)
+static int vhost_scsi_write_pending_status(struct se_cmd *se_cmd)
 {
 	return 0;
 }
 
-static void tcm_vhost_set_default_node_attrs(struct se_node_acl *nacl)
+static void vhost_scsi_set_default_node_attrs(struct se_node_acl *nacl)
 {
 	return;
 }
 
-static u32 tcm_vhost_get_task_tag(struct se_cmd *se_cmd)
+static u32 vhost_scsi_get_task_tag(struct se_cmd *se_cmd)
 {
 	return 0;
 }
 
-static int tcm_vhost_get_cmd_state(struct se_cmd *se_cmd)
+static int vhost_scsi_get_cmd_state(struct se_cmd *se_cmd)
 {
 	return 0;
 }
 
-static void vhost_scsi_complete_cmd(struct tcm_vhost_cmd *cmd)
+static void vhost_scsi_complete_cmd(struct vhost_scsi_cmd *cmd)
 {
 	struct vhost_scsi *vs = cmd->tvc_vhost;
 
@@ -527,44 +530,44 @@ static void vhost_scsi_complete_cmd(struct tcm_vhost_cmd *cmd)
 	vhost_work_queue(&vs->dev, &vs->vs_completion_work);
 }
 
-static int tcm_vhost_queue_data_in(struct se_cmd *se_cmd)
+static int vhost_scsi_queue_data_in(struct se_cmd *se_cmd)
 {
-	struct tcm_vhost_cmd *cmd = container_of(se_cmd,
-				struct tcm_vhost_cmd, tvc_se_cmd);
+	struct vhost_scsi_cmd *cmd = container_of(se_cmd,
+				struct vhost_scsi_cmd, tvc_se_cmd);
 	vhost_scsi_complete_cmd(cmd);
 	return 0;
 }
 
-static int tcm_vhost_queue_status(struct se_cmd *se_cmd)
+static int vhost_scsi_queue_status(struct se_cmd *se_cmd)
 {
-	struct tcm_vhost_cmd *cmd = container_of(se_cmd,
-				struct tcm_vhost_cmd, tvc_se_cmd);
+	struct vhost_scsi_cmd *cmd = container_of(se_cmd,
+				struct vhost_scsi_cmd, tvc_se_cmd);
 	vhost_scsi_complete_cmd(cmd);
 	return 0;
 }
 
-static void tcm_vhost_queue_tm_rsp(struct se_cmd *se_cmd)
+static void vhost_scsi_queue_tm_rsp(struct se_cmd *se_cmd)
 {
 	return;
 }
 
-static void tcm_vhost_aborted_task(struct se_cmd *se_cmd)
+static void vhost_scsi_aborted_task(struct se_cmd *se_cmd)
 {
 	return;
 }
 
-static void tcm_vhost_free_evt(struct vhost_scsi *vs, struct tcm_vhost_evt *evt)
+static void vhost_scsi_free_evt(struct vhost_scsi *vs, struct vhost_scsi_evt *evt)
 {
 	vs->vs_events_nr--;
 	kfree(evt);
 }
 
-static struct tcm_vhost_evt *
-tcm_vhost_allocate_evt(struct vhost_scsi *vs,
+static struct vhost_scsi_evt *
+vhost_scsi_allocate_evt(struct vhost_scsi *vs,
 		       u32 event, u32 reason)
 {
 	struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
-	struct tcm_vhost_evt *evt;
+	struct vhost_scsi_evt *evt;
 
 	if (vs->vs_events_nr > VHOST_SCSI_MAX_EVENT) {
 		vs->vs_events_missed = true;
@@ -573,7 +576,7 @@ tcm_vhost_allocate_evt(struct vhost_scsi *vs,
 
 	evt = kzalloc(sizeof(*evt), GFP_KERNEL);
 	if (!evt) {
-		vq_err(vq, "Failed to allocate tcm_vhost_evt\n");
+		vq_err(vq, "Failed to allocate vhost_scsi_evt\n");
 		vs->vs_events_missed = true;
 		return NULL;
 	}
@@ -585,7 +588,7 @@ tcm_vhost_allocate_evt(struct vhost_scsi *vs,
 	return evt;
 }
 
-static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *cmd)
+static void vhost_scsi_free_cmd(struct vhost_scsi_cmd *cmd)
 {
 	struct se_cmd *se_cmd = &cmd->tvc_se_cmd;
 
@@ -600,7 +603,7 @@ static int vhost_scsi_check_stop_free(struct se_cmd *se_cmd)
 }
 
 static void
-tcm_vhost_do_evt_work(struct vhost_scsi *vs, struct tcm_vhost_evt *evt)
+vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt)
 {
 	struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
 	struct virtio_scsi_event *event = &evt->event;
@@ -646,24 +649,24 @@ again:
 	if (!ret)
 		vhost_add_used_and_signal(&vs->dev, vq, head, 0);
 	else
-		vq_err(vq, "Faulted on tcm_vhost_send_event\n");
+		vq_err(vq, "Faulted on vhost_scsi_send_event\n");
 }
 
-static void tcm_vhost_evt_work(struct vhost_work *work)
+static void vhost_scsi_evt_work(struct vhost_work *work)
 {
 	struct vhost_scsi *vs = container_of(work, struct vhost_scsi,
 					vs_event_work);
 	struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
-	struct tcm_vhost_evt *evt;
+	struct vhost_scsi_evt *evt;
 	struct llist_node *llnode;
 
 	mutex_lock(&vq->mutex);
 	llnode = llist_del_all(&vs->vs_event_list);
 	while (llnode) {
-		evt = llist_entry(llnode, struct tcm_vhost_evt, list);
+		evt = llist_entry(llnode, struct vhost_scsi_evt, list);
 		llnode = llist_next(llnode);
-		tcm_vhost_do_evt_work(vs, evt);
-		tcm_vhost_free_evt(vs, evt);
+		vhost_scsi_do_evt_work(vs, evt);
+		vhost_scsi_free_evt(vs, evt);
 	}
 	mutex_unlock(&vq->mutex);
 }
@@ -679,15 +682,16 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
 					vs_completion_work);
 	DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ);
 	struct virtio_scsi_cmd_resp v_rsp;
-	struct tcm_vhost_cmd *cmd;
+	struct vhost_scsi_cmd *cmd;
 	struct llist_node *llnode;
 	struct se_cmd *se_cmd;
+	struct iov_iter iov_iter;
 	int ret, vq;
 
 	bitmap_zero(signal, VHOST_SCSI_MAX_VQ);
 	llnode = llist_del_all(&vs->vs_completion_list);
 	while (llnode) {
-		cmd = llist_entry(llnode, struct tcm_vhost_cmd,
+		cmd = llist_entry(llnode, struct vhost_scsi_cmd,
 				     tvc_completion_list);
 		llnode = llist_next(llnode);
 		se_cmd = &cmd->tvc_se_cmd;
@@ -703,8 +707,11 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
 						 se_cmd->scsi_sense_length);
 		memcpy(v_rsp.sense, cmd->tvc_sense_buf,
 		       se_cmd->scsi_sense_length);
-		ret = copy_to_user(cmd->tvc_resp, &v_rsp, sizeof(v_rsp));
-		if (likely(ret == 0)) {
+
+		iov_iter_init(&iov_iter, READ, cmd->tvc_resp_iov,
+			      cmd->tvc_in_iovs, sizeof(v_rsp));
+		ret = copy_to_iter(&v_rsp, sizeof(v_rsp), &iov_iter);
+		if (likely(ret == sizeof(v_rsp))) {
 			struct vhost_scsi_virtqueue *q;
 			vhost_add_used(cmd->tvc_vq, cmd->tvc_vq_desc, 0);
 			q = container_of(cmd->tvc_vq, struct vhost_scsi_virtqueue, vq);
@@ -722,13 +729,13 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
 		vhost_signal(&vs->dev, &vs->vqs[vq].vq);
 }
 
-static struct tcm_vhost_cmd *
-vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct tcm_vhost_tpg *tpg,
+static struct vhost_scsi_cmd *
+vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct vhost_scsi_tpg *tpg,
 		   unsigned char *cdb, u64 scsi_tag, u16 lun, u8 task_attr,
 		   u32 exp_data_len, int data_direction)
 {
-	struct tcm_vhost_cmd *cmd;
-	struct tcm_vhost_nexus *tv_nexus;
+	struct vhost_scsi_cmd *cmd;
+	struct vhost_scsi_nexus *tv_nexus;
 	struct se_session *se_sess;
 	struct scatterlist *sg, *prot_sg;
 	struct page **pages;
@@ -736,22 +743,22 @@ vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct tcm_vhost_tpg *tpg,
 
 	tv_nexus = tpg->tpg_nexus;
 	if (!tv_nexus) {
-		pr_err("Unable to locate active struct tcm_vhost_nexus\n");
+		pr_err("Unable to locate active struct vhost_scsi_nexus\n");
 		return ERR_PTR(-EIO);
 	}
 	se_sess = tv_nexus->tvn_se_sess;
 
 	tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
 	if (tag < 0) {
-		pr_err("Unable to obtain tag for tcm_vhost_cmd\n");
+		pr_err("Unable to obtain tag for vhost_scsi_cmd\n");
 		return ERR_PTR(-ENOMEM);
 	}
 
-	cmd = &((struct tcm_vhost_cmd *)se_sess->sess_cmd_map)[tag];
+	cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[tag];
 	sg = cmd->tvc_sgl;
 	prot_sg = cmd->tvc_prot_sgl;
 	pages = cmd->tvc_upages;
-	memset(cmd, 0, sizeof(struct tcm_vhost_cmd));
+	memset(cmd, 0, sizeof(struct vhost_scsi_cmd));
 
 	cmd->tvc_sgl = sg;
 	cmd->tvc_prot_sgl = prot_sg;
@@ -763,9 +770,9 @@ vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct tcm_vhost_tpg *tpg,
 	cmd->tvc_exp_data_len = exp_data_len;
 	cmd->tvc_data_direction = data_direction;
 	cmd->tvc_nexus = tv_nexus;
-	cmd->inflight = tcm_vhost_get_inflight(vq);
+	cmd->inflight = vhost_scsi_get_inflight(vq);
 
-	memcpy(cmd->tvc_cdb, cdb, TCM_VHOST_MAX_CDB_SIZE);
+	memcpy(cmd->tvc_cdb, cdb, VHOST_SCSI_MAX_CDB_SIZE);
 
 	return cmd;
 }
@@ -776,29 +783,22 @@ vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct tcm_vhost_tpg *tpg,
  * Returns the number of scatterlist entries used or -errno on error.
  */
 static int
-vhost_scsi_map_to_sgl(struct tcm_vhost_cmd *tv_cmd,
+vhost_scsi_map_to_sgl(struct vhost_scsi_cmd *cmd,
+		      void __user *ptr,
+		      size_t len,
 		      struct scatterlist *sgl,
-		      unsigned int sgl_count,
-		      struct iovec *iov,
-		      struct page **pages,
 		      bool write)
 {
-	unsigned int npages = 0, pages_nr, offset, nbytes;
+	unsigned int npages = 0, offset, nbytes;
+	unsigned int pages_nr = iov_num_pages(ptr, len);
 	struct scatterlist *sg = sgl;
-	void __user *ptr = iov->iov_base;
-	size_t len = iov->iov_len;
+	struct page **pages = cmd->tvc_upages;
 	int ret, i;
 
-	pages_nr = iov_num_pages(iov);
-	if (pages_nr > sgl_count) {
-		pr_err("vhost_scsi_map_to_sgl() pages_nr: %u greater than"
-		       " sgl_count: %u\n", pages_nr, sgl_count);
-		return -ENOBUFS;
-	}
-	if (pages_nr > TCM_VHOST_PREALLOC_UPAGES) {
+	if (pages_nr > VHOST_SCSI_PREALLOC_UPAGES) {
 		pr_err("vhost_scsi_map_to_sgl() pages_nr: %u greater than"
-		       " preallocated TCM_VHOST_PREALLOC_UPAGES: %u\n",
-			pages_nr, TCM_VHOST_PREALLOC_UPAGES);
+		       " preallocated VHOST_SCSI_PREALLOC_UPAGES: %u\n",
+			pages_nr, VHOST_SCSI_PREALLOC_UPAGES);
 		return -ENOBUFS;
 	}
 
@@ -829,84 +829,94 @@ out:
 }
 
 static int
-vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *cmd,
-			  struct iovec *iov,
-			  int niov,
-			  bool write)
+vhost_scsi_calc_sgls(struct iov_iter *iter, size_t bytes, int max_sgls)
 {
-	struct scatterlist *sg = cmd->tvc_sgl;
-	unsigned int sgl_count = 0;
-	int ret, i;
+	int sgl_count = 0;
 
-	for (i = 0; i < niov; i++)
-		sgl_count += iov_num_pages(&iov[i]);
+	if (!iter || !iter->iov) {
+		pr_err("%s: iter->iov is NULL, but expected bytes: %zu"
+		       " present\n", __func__, bytes);
+		return -EINVAL;
+	}
 
-	if (sgl_count > TCM_VHOST_PREALLOC_SGLS) {
-		pr_err("vhost_scsi_map_iov_to_sgl() sgl_count: %u greater than"
-			" preallocated TCM_VHOST_PREALLOC_SGLS: %u\n",
-			sgl_count, TCM_VHOST_PREALLOC_SGLS);
-		return -ENOBUFS;
+	sgl_count = iov_iter_npages(iter, 0xffff);
+	if (sgl_count > max_sgls) {
+		pr_err("%s: requested sgl_count: %d exceeds pre-allocated"
+		       " max_sgls: %d\n", __func__, sgl_count, max_sgls);
+		return -EINVAL;
 	}
+	return sgl_count;
+}
 
-	pr_debug("%s sg %p sgl_count %u\n", __func__, sg, sgl_count);
-	sg_init_table(sg, sgl_count);
-	cmd->tvc_sgl_count = sgl_count;
+static int
+vhost_scsi_iov_to_sgl(struct vhost_scsi_cmd *cmd, bool write,
+		      struct iov_iter *iter,
+		      struct scatterlist *sg, int sg_count)
+{
+	size_t off = iter->iov_offset;
+	int i, ret;
 
-	pr_debug("Mapping iovec %p for %u pages\n", &iov[0], sgl_count);
+	for (i = 0; i < iter->nr_segs; i++) {
+		void __user *base = iter->iov[i].iov_base + off;
+		size_t len = iter->iov[i].iov_len - off;
 
-	for (i = 0; i < niov; i++) {
-		ret = vhost_scsi_map_to_sgl(cmd, sg, sgl_count, &iov[i],
-					    cmd->tvc_upages, write);
+		ret = vhost_scsi_map_to_sgl(cmd, base, len, sg, write);
 		if (ret < 0) {
-			for (i = 0; i < cmd->tvc_sgl_count; i++)
-				put_page(sg_page(&cmd->tvc_sgl[i]));
-
-			cmd->tvc_sgl_count = 0;
+			for (i = 0; i < sg_count; i++) {
+				struct page *page = sg_page(&sg[i]);
+				if (page)
+					put_page(page);
+			}
 			return ret;
 		}
 		sg += ret;
-		sgl_count -= ret;
+		off = 0;
 	}
 	return 0;
 }
 
 static int
-vhost_scsi_map_iov_to_prot(struct tcm_vhost_cmd *cmd,
-			   struct iovec *iov,
-			   int niov,
-			   bool write)
-{
-	struct scatterlist *prot_sg = cmd->tvc_prot_sgl;
-	unsigned int prot_sgl_count = 0;
-	int ret, i;
-
-	for (i = 0; i < niov; i++)
-		prot_sgl_count += iov_num_pages(&iov[i]);
-
-	if (prot_sgl_count > TCM_VHOST_PREALLOC_PROT_SGLS) {
-		pr_err("vhost_scsi_map_iov_to_prot() sgl_count: %u greater than"
-			" preallocated TCM_VHOST_PREALLOC_PROT_SGLS: %u\n",
-			prot_sgl_count, TCM_VHOST_PREALLOC_PROT_SGLS);
-		return -ENOBUFS;
-	}
-
-	pr_debug("%s prot_sg %p prot_sgl_count %u\n", __func__,
-		 prot_sg, prot_sgl_count);
-	sg_init_table(prot_sg, prot_sgl_count);
-	cmd->tvc_prot_sgl_count = prot_sgl_count;
-
-	for (i = 0; i < niov; i++) {
-		ret = vhost_scsi_map_to_sgl(cmd, prot_sg, prot_sgl_count, &iov[i],
-					    cmd->tvc_upages, write);
+vhost_scsi_mapal(struct vhost_scsi_cmd *cmd,
+		 size_t prot_bytes, struct iov_iter *prot_iter,
+		 size_t data_bytes, struct iov_iter *data_iter)
+{
+	int sgl_count, ret;
+	bool write = (cmd->tvc_data_direction == DMA_FROM_DEVICE);
+
+	if (prot_bytes) {
+		sgl_count = vhost_scsi_calc_sgls(prot_iter, prot_bytes,
+						 VHOST_SCSI_PREALLOC_PROT_SGLS);
+		if (sgl_count < 0)
+			return sgl_count;
+
+		sg_init_table(cmd->tvc_prot_sgl, sgl_count);
+		cmd->tvc_prot_sgl_count = sgl_count;
+		pr_debug("%s prot_sg %p prot_sgl_count %u\n", __func__,
+			 cmd->tvc_prot_sgl, cmd->tvc_prot_sgl_count);
+
+		ret = vhost_scsi_iov_to_sgl(cmd, write, prot_iter,
+					    cmd->tvc_prot_sgl,
+					    cmd->tvc_prot_sgl_count);
 		if (ret < 0) {
-			for (i = 0; i < cmd->tvc_prot_sgl_count; i++)
-				put_page(sg_page(&cmd->tvc_prot_sgl[i]));
-
 			cmd->tvc_prot_sgl_count = 0;
 			return ret;
 		}
-		prot_sg += ret;
-		prot_sgl_count -= ret;
+	}
+	sgl_count = vhost_scsi_calc_sgls(data_iter, data_bytes,
+					 VHOST_SCSI_PREALLOC_SGLS);
+	if (sgl_count < 0)
+		return sgl_count;
+
+	sg_init_table(cmd->tvc_sgl, sgl_count);
+	cmd->tvc_sgl_count = sgl_count;
+	pr_debug("%s data_sg %p data_sgl_count %u\n", __func__,
+		  cmd->tvc_sgl, cmd->tvc_sgl_count);
+
+	ret = vhost_scsi_iov_to_sgl(cmd, write, data_iter,
+				    cmd->tvc_sgl, cmd->tvc_sgl_count);
+	if (ret < 0) {
+		cmd->tvc_sgl_count = 0;
+		return ret;
 	}
 	return 0;
 }
@@ -928,11 +938,11 @@ static int vhost_scsi_to_tcm_attr(int attr)
 	return TCM_SIMPLE_TAG;
 }
 
-static void tcm_vhost_submission_work(struct work_struct *work)
+static void vhost_scsi_submission_work(struct work_struct *work)
 {
-	struct tcm_vhost_cmd *cmd =
-		container_of(work, struct tcm_vhost_cmd, work);
-	struct tcm_vhost_nexus *tv_nexus;
+	struct vhost_scsi_cmd *cmd =
+		container_of(work, struct vhost_scsi_cmd, work);
+	struct vhost_scsi_nexus *tv_nexus;
 	struct se_cmd *se_cmd = &cmd->tvc_se_cmd;
 	struct scatterlist *sg_ptr, *sg_prot_ptr = NULL;
 	int rc;
@@ -986,19 +996,20 @@ vhost_scsi_send_bad_target(struct vhost_scsi *vs,
 static void
 vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
 {
-	struct tcm_vhost_tpg **vs_tpg;
+	struct vhost_scsi_tpg **vs_tpg, *tpg;
 	struct virtio_scsi_cmd_req v_req;
 	struct virtio_scsi_cmd_req_pi v_req_pi;
-	struct tcm_vhost_tpg *tpg;
-	struct tcm_vhost_cmd *cmd;
+	struct vhost_scsi_cmd *cmd;
+	struct iov_iter out_iter, in_iter, prot_iter, data_iter;
 	u64 tag;
-	u32 exp_data_len, data_first, data_num, data_direction, prot_first;
-	unsigned out, in, i;
-	int head, ret, data_niov, prot_niov, prot_bytes;
-	size_t req_size;
+	u32 exp_data_len, data_direction;
+	unsigned out, in;
+	int head, ret, prot_bytes;
+	size_t req_size, rsp_size = sizeof(struct virtio_scsi_cmd_resp);
+	size_t out_size, in_size;
 	u16 lun;
 	u8 *target, *lunp, task_attr;
-	bool hdr_pi;
+	bool t10_pi = vhost_has_feature(vq, VIRTIO_SCSI_F_T10_PI);
 	void *req, *cdb;
 
 	mutex_lock(&vq->mutex);
@@ -1014,10 +1025,10 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
 
 	for (;;) {
 		head = vhost_get_vq_desc(vq, vq->iov,
-					ARRAY_SIZE(vq->iov), &out, &in,
-					NULL, NULL);
+					 ARRAY_SIZE(vq->iov), &out, &in,
+					 NULL, NULL);
 		pr_debug("vhost_get_vq_desc: head: %d, out: %u in: %u\n",
-					head, out, in);
+			 head, out, in);
 		/* On error, stop handling until the next kick. */
 		if (unlikely(head < 0))
 			break;
@@ -1029,113 +1040,134 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
 			}
 			break;
 		}
-
-		/* FIXME: BIDI operation */
-		if (out == 1 && in == 1) {
-			data_direction = DMA_NONE;
-			data_first = 0;
-			data_num = 0;
-		} else if (out == 1 && in > 1) {
-			data_direction = DMA_FROM_DEVICE;
-			data_first = out + 1;
-			data_num = in - 1;
-		} else if (out > 1 && in == 1) {
-			data_direction = DMA_TO_DEVICE;
-			data_first = 1;
-			data_num = out - 1;
-		} else {
-			vq_err(vq, "Invalid buffer layout out: %u in: %u\n",
-					out, in);
-			break;
-		}
-
 		/*
-		 * Check for a sane resp buffer so we can report errors to
-		 * the guest.
+		 * Check for a sane response buffer so we can report early
+		 * errors back to the guest.
 		 */
-		if (unlikely(vq->iov[out].iov_len !=
-					sizeof(struct virtio_scsi_cmd_resp))) {
-			vq_err(vq, "Expecting virtio_scsi_cmd_resp, got %zu"
-				" bytes\n", vq->iov[out].iov_len);
+		if (unlikely(vq->iov[out].iov_len < rsp_size)) {
+			vq_err(vq, "Expecting at least virtio_scsi_cmd_resp"
+				" size, got %zu bytes\n", vq->iov[out].iov_len);
 			break;
 		}
-
-		if (vhost_has_feature(vq, VIRTIO_SCSI_F_T10_PI)) {
+		/*
+		 * Setup pointers and values based upon different virtio-scsi
+		 * request header if T10_PI is enabled in KVM guest.
+		 */
+		if (t10_pi) {
 			req = &v_req_pi;
+			req_size = sizeof(v_req_pi);
 			lunp = &v_req_pi.lun[0];
 			target = &v_req_pi.lun[1];
-			req_size = sizeof(v_req_pi);
-			hdr_pi = true;
 		} else {
 			req = &v_req;
+			req_size = sizeof(v_req);
 			lunp = &v_req.lun[0];
 			target = &v_req.lun[1];
-			req_size = sizeof(v_req);
-			hdr_pi = false;
 		}
+		/*
+		 * FIXME: Not correct for BIDI operation
+		 */
+		out_size = iov_length(vq->iov, out);
+		in_size = iov_length(&vq->iov[out], in);
 
-		if (unlikely(vq->iov[0].iov_len < req_size)) {
-			pr_err("Expecting virtio-scsi header: %zu, got %zu\n",
-			       req_size, vq->iov[0].iov_len);
-			break;
-		}
-		ret = copy_from_user(req, vq->iov[0].iov_base, req_size);
-		if (unlikely(ret)) {
-			vq_err(vq, "Faulted on virtio_scsi_cmd_req\n");
-			break;
-		}
+		/*
+		 * Copy over the virtio-scsi request header, which for a
+		 * ANY_LAYOUT enabled guest may span multiple iovecs, or a
+		 * single iovec may contain both the header + outgoing
+		 * WRITE payloads.
+		 *
+		 * copy_from_iter() will advance out_iter, so that it will
+		 * point at the start of the outgoing WRITE payload, if
+		 * DMA_TO_DEVICE is set.
+		 */
+		iov_iter_init(&out_iter, WRITE, vq->iov, out, out_size);
 
+		ret = copy_from_iter(req, req_size, &out_iter);
+		if (unlikely(ret != req_size)) {
+			vq_err(vq, "Faulted on copy_from_iter\n");
+			vhost_scsi_send_bad_target(vs, vq, head, out);
+			continue;
+		}
 		/* virtio-scsi spec requires byte 0 of the lun to be 1 */
 		if (unlikely(*lunp != 1)) {
+			vq_err(vq, "Illegal virtio-scsi lun: %u\n", *lunp);
 			vhost_scsi_send_bad_target(vs, vq, head, out);
 			continue;
 		}
 
 		tpg = ACCESS_ONCE(vs_tpg[*target]);
-
-		/* Target does not exist, fail the request */
 		if (unlikely(!tpg)) {
+			/* Target does not exist, fail the request */
 			vhost_scsi_send_bad_target(vs, vq, head, out);
 			continue;
 		}
-
-		data_niov = data_num;
-		prot_niov = prot_first = prot_bytes = 0;
 		/*
-		 * Determine if any protection information iovecs are preceeding
-		 * the actual data payload, and adjust data_first + data_niov
-		 * values accordingly for vhost_scsi_map_iov_to_sgl() below.
+		 * Determine data_direction by calculating the total outgoing
+		 * iovec sizes + incoming iovec sizes vs. virtio-scsi request +
+		 * response headers respectively.
 		 *
-		 * Also extract virtio_scsi header bits for vhost_scsi_get_tag()
+		 * For DMA_TO_DEVICE this is out_iter, which is already pointing
+		 * to the right place.
+		 *
+		 * For DMA_FROM_DEVICE, the iovec will be just past the end
+		 * of the virtio-scsi response header in either the same
+		 * or immediately following iovec.
+		 *
+		 * Any associated T10_PI bytes for the outgoing / incoming
+		 * payloads are included in calculation of exp_data_len here.
 		 */
-		if (hdr_pi) {
+		prot_bytes = 0;
+
+		if (out_size > req_size) {
+			data_direction = DMA_TO_DEVICE;
+			exp_data_len = out_size - req_size;
+			data_iter = out_iter;
+		} else if (in_size > rsp_size) {
+			data_direction = DMA_FROM_DEVICE;
+			exp_data_len = in_size - rsp_size;
+
+			iov_iter_init(&in_iter, READ, &vq->iov[out], in,
+				      rsp_size + exp_data_len);
+			iov_iter_advance(&in_iter, rsp_size);
+			data_iter = in_iter;
+		} else {
+			data_direction = DMA_NONE;
+			exp_data_len = 0;
+		}
+		/*
+		 * If T10_PI header + payload is present, setup prot_iter values
+		 * and recalculate data_iter for vhost_scsi_mapal() mapping to
+		 * host scatterlists via get_user_pages_fast().
+		 */
+		if (t10_pi) {
 			if (v_req_pi.pi_bytesout) {
 				if (data_direction != DMA_TO_DEVICE) {
-					vq_err(vq, "Received non zero do_pi_niov"
-						", but wrong data_direction\n");
-					goto err_cmd;
+					vq_err(vq, "Received non zero pi_bytesout,"
+						" but wrong data_direction\n");
+					vhost_scsi_send_bad_target(vs, vq, head, out);
+					continue;
 				}
 				prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesout);
 			} else if (v_req_pi.pi_bytesin) {
 				if (data_direction != DMA_FROM_DEVICE) {
-					vq_err(vq, "Received non zero di_pi_niov"
-						", but wrong data_direction\n");
-					goto err_cmd;
+					vq_err(vq, "Received non zero pi_bytesin,"
+						" but wrong data_direction\n");
+					vhost_scsi_send_bad_target(vs, vq, head, out);
+					continue;
 				}
 				prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesin);
 			}
+			/*
+			 * Set prot_iter to data_iter, and advance past any
+			 * preceeding prot_bytes that may be present.
+			 *
+			 * Also fix up the exp_data_len to reflect only the
+			 * actual data payload length.
+			 */
 			if (prot_bytes) {
-				int tmp = 0;
-
-				for (i = 0; i < data_num; i++) {
-					tmp += vq->iov[data_first + i].iov_len;
-					prot_niov++;
-					if (tmp >= prot_bytes)
-						break;
-				}
-				prot_first = data_first;
-				data_first += prot_niov;
-				data_niov = data_num - prot_niov;
+				exp_data_len -= prot_bytes;
+				prot_iter = data_iter;
+				iov_iter_advance(&data_iter, prot_bytes);
 			}
 			tag = vhost64_to_cpu(vq, v_req_pi.tag);
 			task_attr = v_req_pi.task_attr;
@@ -1147,83 +1179,65 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
 			cdb = &v_req.cdb[0];
 			lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF;
 		}
-		exp_data_len = 0;
-		for (i = 0; i < data_niov; i++)
-			exp_data_len += vq->iov[data_first + i].iov_len;
 		/*
-		 * Check that the recieved CDB size does not exceeded our
-		 * hardcoded max for vhost-scsi
+		 * Check that the received CDB size does not exceeded our
+		 * hardcoded max for vhost-scsi, then get a pre-allocated
+		 * cmd descriptor for the new virtio-scsi tag.
 		 *
 		 * TODO what if cdb was too small for varlen cdb header?
 		 */
-		if (unlikely(scsi_command_size(cdb) > TCM_VHOST_MAX_CDB_SIZE)) {
+		if (unlikely(scsi_command_size(cdb) > VHOST_SCSI_MAX_CDB_SIZE)) {
 			vq_err(vq, "Received SCSI CDB with command_size: %d that"
 				" exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
-				scsi_command_size(cdb), TCM_VHOST_MAX_CDB_SIZE);
-			goto err_cmd;
+				scsi_command_size(cdb), VHOST_SCSI_MAX_CDB_SIZE);
+			vhost_scsi_send_bad_target(vs, vq, head, out);
+			continue;
 		}
-
 		cmd = vhost_scsi_get_tag(vq, tpg, cdb, tag, lun, task_attr,
 					 exp_data_len + prot_bytes,
 					 data_direction);
 		if (IS_ERR(cmd)) {
 			vq_err(vq, "vhost_scsi_get_tag failed %ld\n",
-					PTR_ERR(cmd));
-			goto err_cmd;
+			       PTR_ERR(cmd));
+			vhost_scsi_send_bad_target(vs, vq, head, out);
+			continue;
 		}
-
-		pr_debug("Allocated tv_cmd: %p exp_data_len: %d, data_direction"
-			": %d\n", cmd, exp_data_len, data_direction);
-
 		cmd->tvc_vhost = vs;
 		cmd->tvc_vq = vq;
-		cmd->tvc_resp = vq->iov[out].iov_base;
+		cmd->tvc_resp_iov = &vq->iov[out];
+		cmd->tvc_in_iovs = in;
 
 		pr_debug("vhost_scsi got command opcode: %#02x, lun: %d\n",
-			cmd->tvc_cdb[0], cmd->tvc_lun);
+			 cmd->tvc_cdb[0], cmd->tvc_lun);
+		pr_debug("cmd: %p exp_data_len: %d, prot_bytes: %d data_direction:"
+			 " %d\n", cmd, exp_data_len, prot_bytes, data_direction);
 
-		if (prot_niov) {
-			ret = vhost_scsi_map_iov_to_prot(cmd,
-					&vq->iov[prot_first], prot_niov,
-					data_direction == DMA_FROM_DEVICE);
-			if (unlikely(ret)) {
-				vq_err(vq, "Failed to map iov to"
-					" prot_sgl\n");
-				goto err_free;
-			}
-		}
 		if (data_direction != DMA_NONE) {
-			ret = vhost_scsi_map_iov_to_sgl(cmd,
-					&vq->iov[data_first], data_niov,
-					data_direction == DMA_FROM_DEVICE);
+			ret = vhost_scsi_mapal(cmd,
+					       prot_bytes, &prot_iter,
+					       exp_data_len, &data_iter);
 			if (unlikely(ret)) {
 				vq_err(vq, "Failed to map iov to sgl\n");
-				goto err_free;
+				vhost_scsi_release_cmd(&cmd->tvc_se_cmd);
+				vhost_scsi_send_bad_target(vs, vq, head, out);
+				continue;
 			}
 		}
 		/*
 		 * Save the descriptor from vhost_get_vq_desc() to be used to
 		 * complete the virtio-scsi request in TCM callback context via
-		 * tcm_vhost_queue_data_in() and tcm_vhost_queue_status()
+		 * vhost_scsi_queue_data_in() and vhost_scsi_queue_status()
 		 */
 		cmd->tvc_vq_desc = head;
 		/*
-		 * Dispatch tv_cmd descriptor for cmwq execution in process
-		 * context provided by tcm_vhost_workqueue.  This also ensures
-		 * tv_cmd is executed on the same kworker CPU as this vhost
-		 * thread to gain positive L2 cache locality effects..
+		 * Dispatch cmd descriptor for cmwq execution in process
+		 * context provided by vhost_scsi_workqueue.  This also ensures
+		 * cmd is executed on the same kworker CPU as this vhost
+		 * thread to gain positive L2 cache locality effects.
 		 */
-		INIT_WORK(&cmd->work, tcm_vhost_submission_work);
-		queue_work(tcm_vhost_workqueue, &cmd->work);
+		INIT_WORK(&cmd->work, vhost_scsi_submission_work);
+		queue_work(vhost_scsi_workqueue, &cmd->work);
 	}
-
-	mutex_unlock(&vq->mutex);
-	return;
-
-err_free:
-	vhost_scsi_free_cmd(cmd);
-err_cmd:
-	vhost_scsi_send_bad_target(vs, vq, head, out);
 out:
 	mutex_unlock(&vq->mutex);
 }
@@ -1234,15 +1248,15 @@ static void vhost_scsi_ctl_handle_kick(struct vhost_work *work)
 }
 
 static void
-tcm_vhost_send_evt(struct vhost_scsi *vs,
-		   struct tcm_vhost_tpg *tpg,
+vhost_scsi_send_evt(struct vhost_scsi *vs,
+		   struct vhost_scsi_tpg *tpg,
 		   struct se_lun *lun,
 		   u32 event,
 		   u32 reason)
 {
-	struct tcm_vhost_evt *evt;
+	struct vhost_scsi_evt *evt;
 
-	evt = tcm_vhost_allocate_evt(vs, event, reason);
+	evt = vhost_scsi_allocate_evt(vs, event, reason);
 	if (!evt)
 		return;
 
@@ -1253,7 +1267,7 @@ tcm_vhost_send_evt(struct vhost_scsi *vs,
 		 * lun[4-7] need to be zero according to virtio-scsi spec.
 		 */
 		evt->event.lun[0] = 0x01;
-		evt->event.lun[1] = tpg->tport_tpgt & 0xFF;
+		evt->event.lun[1] = tpg->tport_tpgt;
 		if (lun->unpacked_lun >= 256)
 			evt->event.lun[2] = lun->unpacked_lun >> 8 | 0x40 ;
 		evt->event.lun[3] = lun->unpacked_lun & 0xFF;
@@ -1274,7 +1288,7 @@ static void vhost_scsi_evt_handle_kick(struct vhost_work *work)
 		goto out;
 
 	if (vs->vs_events_missed)
-		tcm_vhost_send_evt(vs, NULL, NULL, VIRTIO_SCSI_T_NO_EVENT, 0);
+		vhost_scsi_send_evt(vs, NULL, NULL, VIRTIO_SCSI_T_NO_EVENT, 0);
 out:
 	mutex_unlock(&vq->mutex);
 }
@@ -1300,7 +1314,7 @@ static void vhost_scsi_flush(struct vhost_scsi *vs)
 	int i;
 
 	/* Init new inflight and remember the old inflight */
-	tcm_vhost_init_inflight(vs, old_inflight);
+	vhost_scsi_init_inflight(vs, old_inflight);
 
 	/*
 	 * The inflight->kref was initialized to 1. We decrement it here to
@@ -1308,7 +1322,7 @@ static void vhost_scsi_flush(struct vhost_scsi *vs)
 	 * when all the reqs are finished.
 	 */
 	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
-		kref_put(&old_inflight[i]->kref, tcm_vhost_done_inflight);
+		kref_put(&old_inflight[i]->kref, vhost_scsi_done_inflight);
 
 	/* Flush both the vhost poll and vhost work */
 	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
@@ -1323,24 +1337,24 @@ static void vhost_scsi_flush(struct vhost_scsi *vs)
 
 /*
  * Called from vhost_scsi_ioctl() context to walk the list of available
- * tcm_vhost_tpg with an active struct tcm_vhost_nexus
+ * vhost_scsi_tpg with an active struct vhost_scsi_nexus
  *
  *  The lock nesting rule is:
- *    tcm_vhost_mutex -> vs->dev.mutex -> tpg->tv_tpg_mutex -> vq->mutex
+ *    vhost_scsi_mutex -> vs->dev.mutex -> tpg->tv_tpg_mutex -> vq->mutex
  */
 static int
 vhost_scsi_set_endpoint(struct vhost_scsi *vs,
 			struct vhost_scsi_target *t)
 {
 	struct se_portal_group *se_tpg;
-	struct tcm_vhost_tport *tv_tport;
-	struct tcm_vhost_tpg *tpg;
-	struct tcm_vhost_tpg **vs_tpg;
+	struct vhost_scsi_tport *tv_tport;
+	struct vhost_scsi_tpg *tpg;
+	struct vhost_scsi_tpg **vs_tpg;
 	struct vhost_virtqueue *vq;
 	int index, ret, i, len;
 	bool match = false;
 
-	mutex_lock(&tcm_vhost_mutex);
+	mutex_lock(&vhost_scsi_mutex);
 	mutex_lock(&vs->dev.mutex);
 
 	/* Verify that ring has been setup correctly. */
@@ -1361,7 +1375,7 @@ vhost_scsi_set_endpoint(struct vhost_scsi *vs,
 	if (vs->vs_tpg)
 		memcpy(vs_tpg, vs->vs_tpg, len);
 
-	list_for_each_entry(tpg, &tcm_vhost_list, tv_tpg_list) {
+	list_for_each_entry(tpg, &vhost_scsi_list, tv_tpg_list) {
 		mutex_lock(&tpg->tv_tpg_mutex);
 		if (!tpg->tpg_nexus) {
 			mutex_unlock(&tpg->tv_tpg_mutex);
@@ -1429,7 +1443,7 @@ vhost_scsi_set_endpoint(struct vhost_scsi *vs,
 
 out:
 	mutex_unlock(&vs->dev.mutex);
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_unlock(&vhost_scsi_mutex);
 	return ret;
 }
 
@@ -1438,14 +1452,14 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs,
 			  struct vhost_scsi_target *t)
 {
 	struct se_portal_group *se_tpg;
-	struct tcm_vhost_tport *tv_tport;
-	struct tcm_vhost_tpg *tpg;
+	struct vhost_scsi_tport *tv_tport;
+	struct vhost_scsi_tpg *tpg;
 	struct vhost_virtqueue *vq;
 	bool match = false;
 	int index, ret, i;
 	u8 target;
 
-	mutex_lock(&tcm_vhost_mutex);
+	mutex_lock(&vhost_scsi_mutex);
 	mutex_lock(&vs->dev.mutex);
 	/* Verify that ring has been setup correctly. */
 	for (index = 0; index < vs->dev.nvqs; ++index) {
@@ -1511,14 +1525,14 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs,
 	vs->vs_tpg = NULL;
 	WARN_ON(vs->vs_events_nr);
 	mutex_unlock(&vs->dev.mutex);
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_unlock(&vhost_scsi_mutex);
 	return 0;
 
 err_tpg:
 	mutex_unlock(&tpg->tv_tpg_mutex);
 err_dev:
 	mutex_unlock(&vs->dev.mutex);
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_unlock(&vhost_scsi_mutex);
 	return ret;
 }
 
@@ -1565,7 +1579,7 @@ static int vhost_scsi_open(struct inode *inode, struct file *f)
 		goto err_vqs;
 
 	vhost_work_init(&vs->vs_completion_work, vhost_scsi_complete_cmd_work);
-	vhost_work_init(&vs->vs_event_work, tcm_vhost_evt_work);
+	vhost_work_init(&vs->vs_event_work, vhost_scsi_evt_work);
 
 	vs->vs_events_nr = 0;
 	vs->vs_events_missed = false;
@@ -1580,7 +1594,7 @@ static int vhost_scsi_open(struct inode *inode, struct file *f)
 	}
 	vhost_dev_init(&vs->dev, vqs, VHOST_SCSI_MAX_VQ);
 
-	tcm_vhost_init_inflight(vs, NULL);
+	vhost_scsi_init_inflight(vs, NULL);
 
 	f->private_data = vs;
 	return 0;
@@ -1712,7 +1726,7 @@ static int vhost_scsi_deregister(void)
 	return misc_deregister(&vhost_scsi_misc);
 }
 
-static char *tcm_vhost_dump_proto_id(struct tcm_vhost_tport *tport)
+static char *vhost_scsi_dump_proto_id(struct vhost_scsi_tport *tport)
 {
 	switch (tport->tport_proto_id) {
 	case SCSI_PROTOCOL_SAS:
@@ -1729,7 +1743,7 @@ static char *tcm_vhost_dump_proto_id(struct tcm_vhost_tport *tport)
 }
 
 static void
-tcm_vhost_do_plug(struct tcm_vhost_tpg *tpg,
+vhost_scsi_do_plug(struct vhost_scsi_tpg *tpg,
 		  struct se_lun *lun, bool plug)
 {
 
@@ -1750,71 +1764,71 @@ tcm_vhost_do_plug(struct tcm_vhost_tpg *tpg,
 	vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
 	mutex_lock(&vq->mutex);
 	if (vhost_has_feature(vq, VIRTIO_SCSI_F_HOTPLUG))
-		tcm_vhost_send_evt(vs, tpg, lun,
+		vhost_scsi_send_evt(vs, tpg, lun,
 				   VIRTIO_SCSI_T_TRANSPORT_RESET, reason);
 	mutex_unlock(&vq->mutex);
 	mutex_unlock(&vs->dev.mutex);
 }
 
-static void tcm_vhost_hotplug(struct tcm_vhost_tpg *tpg, struct se_lun *lun)
+static void vhost_scsi_hotplug(struct vhost_scsi_tpg *tpg, struct se_lun *lun)
 {
-	tcm_vhost_do_plug(tpg, lun, true);
+	vhost_scsi_do_plug(tpg, lun, true);
 }
 
-static void tcm_vhost_hotunplug(struct tcm_vhost_tpg *tpg, struct se_lun *lun)
+static void vhost_scsi_hotunplug(struct vhost_scsi_tpg *tpg, struct se_lun *lun)
 {
-	tcm_vhost_do_plug(tpg, lun, false);
+	vhost_scsi_do_plug(tpg, lun, false);
 }
 
-static int tcm_vhost_port_link(struct se_portal_group *se_tpg,
+static int vhost_scsi_port_link(struct se_portal_group *se_tpg,
 			       struct se_lun *lun)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
 
-	mutex_lock(&tcm_vhost_mutex);
+	mutex_lock(&vhost_scsi_mutex);
 
 	mutex_lock(&tpg->tv_tpg_mutex);
 	tpg->tv_tpg_port_count++;
 	mutex_unlock(&tpg->tv_tpg_mutex);
 
-	tcm_vhost_hotplug(tpg, lun);
+	vhost_scsi_hotplug(tpg, lun);
 
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_unlock(&vhost_scsi_mutex);
 
 	return 0;
 }
 
-static void tcm_vhost_port_unlink(struct se_portal_group *se_tpg,
+static void vhost_scsi_port_unlink(struct se_portal_group *se_tpg,
 				  struct se_lun *lun)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
 
-	mutex_lock(&tcm_vhost_mutex);
+	mutex_lock(&vhost_scsi_mutex);
 
 	mutex_lock(&tpg->tv_tpg_mutex);
 	tpg->tv_tpg_port_count--;
 	mutex_unlock(&tpg->tv_tpg_mutex);
 
-	tcm_vhost_hotunplug(tpg, lun);
+	vhost_scsi_hotunplug(tpg, lun);
 
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_unlock(&vhost_scsi_mutex);
 }
 
 static struct se_node_acl *
-tcm_vhost_make_nodeacl(struct se_portal_group *se_tpg,
+vhost_scsi_make_nodeacl(struct se_portal_group *se_tpg,
 		       struct config_group *group,
 		       const char *name)
 {
 	struct se_node_acl *se_nacl, *se_nacl_new;
-	struct tcm_vhost_nacl *nacl;
+	struct vhost_scsi_nacl *nacl;
 	u64 wwpn = 0;
 	u32 nexus_depth;
 
-	/* tcm_vhost_parse_wwn(name, &wwpn, 1) < 0)
+	/* vhost_scsi_parse_wwn(name, &wwpn, 1) < 0)
 		return ERR_PTR(-EINVAL); */
-	se_nacl_new = tcm_vhost_alloc_fabric_acl(se_tpg);
+	se_nacl_new = vhost_scsi_alloc_fabric_acl(se_tpg);
 	if (!se_nacl_new)
 		return ERR_PTR(-ENOMEM);
 
@@ -1826,37 +1840,37 @@ tcm_vhost_make_nodeacl(struct se_portal_group *se_tpg,
 	se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
 				name, nexus_depth);
 	if (IS_ERR(se_nacl)) {
-		tcm_vhost_release_fabric_acl(se_tpg, se_nacl_new);
+		vhost_scsi_release_fabric_acl(se_tpg, se_nacl_new);
 		return se_nacl;
 	}
 	/*
-	 * Locate our struct tcm_vhost_nacl and set the FC Nport WWPN
+	 * Locate our struct vhost_scsi_nacl and set the FC Nport WWPN
 	 */
-	nacl = container_of(se_nacl, struct tcm_vhost_nacl, se_node_acl);
+	nacl = container_of(se_nacl, struct vhost_scsi_nacl, se_node_acl);
 	nacl->iport_wwpn = wwpn;
 
 	return se_nacl;
 }
 
-static void tcm_vhost_drop_nodeacl(struct se_node_acl *se_acl)
+static void vhost_scsi_drop_nodeacl(struct se_node_acl *se_acl)
 {
-	struct tcm_vhost_nacl *nacl = container_of(se_acl,
-				struct tcm_vhost_nacl, se_node_acl);
+	struct vhost_scsi_nacl *nacl = container_of(se_acl,
+				struct vhost_scsi_nacl, se_node_acl);
 	core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1);
 	kfree(nacl);
 }
 
-static void tcm_vhost_free_cmd_map_res(struct tcm_vhost_nexus *nexus,
+static void vhost_scsi_free_cmd_map_res(struct vhost_scsi_nexus *nexus,
 				       struct se_session *se_sess)
 {
-	struct tcm_vhost_cmd *tv_cmd;
+	struct vhost_scsi_cmd *tv_cmd;
 	unsigned int i;
 
 	if (!se_sess->sess_cmd_map)
 		return;
 
-	for (i = 0; i < TCM_VHOST_DEFAULT_TAGS; i++) {
-		tv_cmd = &((struct tcm_vhost_cmd *)se_sess->sess_cmd_map)[i];
+	for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) {
+		tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i];
 
 		kfree(tv_cmd->tvc_sgl);
 		kfree(tv_cmd->tvc_prot_sgl);
@@ -1864,13 +1878,13 @@ static void tcm_vhost_free_cmd_map_res(struct tcm_vhost_nexus *nexus,
 	}
 }
 
-static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
+static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
 				const char *name)
 {
 	struct se_portal_group *se_tpg;
 	struct se_session *se_sess;
-	struct tcm_vhost_nexus *tv_nexus;
-	struct tcm_vhost_cmd *tv_cmd;
+	struct vhost_scsi_nexus *tv_nexus;
+	struct vhost_scsi_cmd *tv_cmd;
 	unsigned int i;
 
 	mutex_lock(&tpg->tv_tpg_mutex);
@@ -1881,19 +1895,19 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
 	}
 	se_tpg = &tpg->se_tpg;
 
-	tv_nexus = kzalloc(sizeof(struct tcm_vhost_nexus), GFP_KERNEL);
+	tv_nexus = kzalloc(sizeof(struct vhost_scsi_nexus), GFP_KERNEL);
 	if (!tv_nexus) {
 		mutex_unlock(&tpg->tv_tpg_mutex);
-		pr_err("Unable to allocate struct tcm_vhost_nexus\n");
+		pr_err("Unable to allocate struct vhost_scsi_nexus\n");
 		return -ENOMEM;
 	}
 	/*
 	 *  Initialize the struct se_session pointer and setup tagpool
-	 *  for struct tcm_vhost_cmd descriptors
+	 *  for struct vhost_scsi_cmd descriptors
 	 */
 	tv_nexus->tvn_se_sess = transport_init_session_tags(
-					TCM_VHOST_DEFAULT_TAGS,
-					sizeof(struct tcm_vhost_cmd),
+					VHOST_SCSI_DEFAULT_TAGS,
+					sizeof(struct vhost_scsi_cmd),
 					TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS);
 	if (IS_ERR(tv_nexus->tvn_se_sess)) {
 		mutex_unlock(&tpg->tv_tpg_mutex);
@@ -1901,11 +1915,11 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
 		return -ENOMEM;
 	}
 	se_sess = tv_nexus->tvn_se_sess;
-	for (i = 0; i < TCM_VHOST_DEFAULT_TAGS; i++) {
-		tv_cmd = &((struct tcm_vhost_cmd *)se_sess->sess_cmd_map)[i];
+	for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) {
+		tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i];
 
 		tv_cmd->tvc_sgl = kzalloc(sizeof(struct scatterlist) *
-					TCM_VHOST_PREALLOC_SGLS, GFP_KERNEL);
+					VHOST_SCSI_PREALLOC_SGLS, GFP_KERNEL);
 		if (!tv_cmd->tvc_sgl) {
 			mutex_unlock(&tpg->tv_tpg_mutex);
 			pr_err("Unable to allocate tv_cmd->tvc_sgl\n");
@@ -1913,7 +1927,7 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
 		}
 
 		tv_cmd->tvc_upages = kzalloc(sizeof(struct page *) *
-					TCM_VHOST_PREALLOC_UPAGES, GFP_KERNEL);
+					VHOST_SCSI_PREALLOC_UPAGES, GFP_KERNEL);
 		if (!tv_cmd->tvc_upages) {
 			mutex_unlock(&tpg->tv_tpg_mutex);
 			pr_err("Unable to allocate tv_cmd->tvc_upages\n");
@@ -1921,7 +1935,7 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
 		}
 
 		tv_cmd->tvc_prot_sgl = kzalloc(sizeof(struct scatterlist) *
-					TCM_VHOST_PREALLOC_PROT_SGLS, GFP_KERNEL);
+					VHOST_SCSI_PREALLOC_PROT_SGLS, GFP_KERNEL);
 		if (!tv_cmd->tvc_prot_sgl) {
 			mutex_unlock(&tpg->tv_tpg_mutex);
 			pr_err("Unable to allocate tv_cmd->tvc_prot_sgl\n");
@@ -1930,7 +1944,7 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
 	}
 	/*
 	 * Since we are running in 'demo mode' this call with generate a
-	 * struct se_node_acl for the tcm_vhost struct se_portal_group with
+	 * struct se_node_acl for the vhost_scsi struct se_portal_group with
 	 * the SCSI Initiator port name of the passed configfs group 'name'.
 	 */
 	tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
@@ -1953,16 +1967,16 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg,
 	return 0;
 
 out:
-	tcm_vhost_free_cmd_map_res(tv_nexus, se_sess);
+	vhost_scsi_free_cmd_map_res(tv_nexus, se_sess);
 	transport_free_session(se_sess);
 	kfree(tv_nexus);
 	return -ENOMEM;
 }
 
-static int tcm_vhost_drop_nexus(struct tcm_vhost_tpg *tpg)
+static int vhost_scsi_drop_nexus(struct vhost_scsi_tpg *tpg)
 {
 	struct se_session *se_sess;
-	struct tcm_vhost_nexus *tv_nexus;
+	struct vhost_scsi_nexus *tv_nexus;
 
 	mutex_lock(&tpg->tv_tpg_mutex);
 	tv_nexus = tpg->tpg_nexus;
@@ -1994,10 +2008,10 @@ static int tcm_vhost_drop_nexus(struct tcm_vhost_tpg *tpg)
 	}
 
 	pr_debug("TCM_vhost_ConfigFS: Removing I_T Nexus to emulated"
-		" %s Initiator Port: %s\n", tcm_vhost_dump_proto_id(tpg->tport),
+		" %s Initiator Port: %s\n", vhost_scsi_dump_proto_id(tpg->tport),
 		tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
 
-	tcm_vhost_free_cmd_map_res(tv_nexus, se_sess);
+	vhost_scsi_free_cmd_map_res(tv_nexus, se_sess);
 	/*
 	 * Release the SCSI I_T Nexus to the emulated vhost Target Port
 	 */
@@ -2009,12 +2023,12 @@ static int tcm_vhost_drop_nexus(struct tcm_vhost_tpg *tpg)
 	return 0;
 }
 
-static ssize_t tcm_vhost_tpg_show_nexus(struct se_portal_group *se_tpg,
+static ssize_t vhost_scsi_tpg_show_nexus(struct se_portal_group *se_tpg,
 					char *page)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_nexus *tv_nexus;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_nexus *tv_nexus;
 	ssize_t ret;
 
 	mutex_lock(&tpg->tv_tpg_mutex);
@@ -2030,40 +2044,40 @@ static ssize_t tcm_vhost_tpg_show_nexus(struct se_portal_group *se_tpg,
 	return ret;
 }
 
-static ssize_t tcm_vhost_tpg_store_nexus(struct se_portal_group *se_tpg,
+static ssize_t vhost_scsi_tpg_store_nexus(struct se_portal_group *se_tpg,
 					 const char *page,
 					 size_t count)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
-	struct tcm_vhost_tport *tport_wwn = tpg->tport;
-	unsigned char i_port[TCM_VHOST_NAMELEN], *ptr, *port_ptr;
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
+	struct vhost_scsi_tport *tport_wwn = tpg->tport;
+	unsigned char i_port[VHOST_SCSI_NAMELEN], *ptr, *port_ptr;
 	int ret;
 	/*
 	 * Shutdown the active I_T nexus if 'NULL' is passed..
 	 */
 	if (!strncmp(page, "NULL", 4)) {
-		ret = tcm_vhost_drop_nexus(tpg);
+		ret = vhost_scsi_drop_nexus(tpg);
 		return (!ret) ? count : ret;
 	}
 	/*
 	 * Otherwise make sure the passed virtual Initiator port WWN matches
-	 * the fabric protocol_id set in tcm_vhost_make_tport(), and call
-	 * tcm_vhost_make_nexus().
+	 * the fabric protocol_id set in vhost_scsi_make_tport(), and call
+	 * vhost_scsi_make_nexus().
 	 */
-	if (strlen(page) >= TCM_VHOST_NAMELEN) {
+	if (strlen(page) >= VHOST_SCSI_NAMELEN) {
 		pr_err("Emulated NAA Sas Address: %s, exceeds"
-				" max: %d\n", page, TCM_VHOST_NAMELEN);
+				" max: %d\n", page, VHOST_SCSI_NAMELEN);
 		return -EINVAL;
 	}
-	snprintf(&i_port[0], TCM_VHOST_NAMELEN, "%s", page);
+	snprintf(&i_port[0], VHOST_SCSI_NAMELEN, "%s", page);
 
 	ptr = strstr(i_port, "naa.");
 	if (ptr) {
 		if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_SAS) {
 			pr_err("Passed SAS Initiator Port %s does not"
 				" match target port protoid: %s\n", i_port,
-				tcm_vhost_dump_proto_id(tport_wwn));
+				vhost_scsi_dump_proto_id(tport_wwn));
 			return -EINVAL;
 		}
 		port_ptr = &i_port[0];
@@ -2074,7 +2088,7 @@ static ssize_t tcm_vhost_tpg_store_nexus(struct se_portal_group *se_tpg,
 		if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_FCP) {
 			pr_err("Passed FCP Initiator Port %s does not"
 				" match target port protoid: %s\n", i_port,
-				tcm_vhost_dump_proto_id(tport_wwn));
+				vhost_scsi_dump_proto_id(tport_wwn));
 			return -EINVAL;
 		}
 		port_ptr = &i_port[3]; /* Skip over "fc." */
@@ -2085,7 +2099,7 @@ static ssize_t tcm_vhost_tpg_store_nexus(struct se_portal_group *se_tpg,
 		if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_ISCSI) {
 			pr_err("Passed iSCSI Initiator Port %s does not"
 				" match target port protoid: %s\n", i_port,
-				tcm_vhost_dump_proto_id(tport_wwn));
+				vhost_scsi_dump_proto_id(tport_wwn));
 			return -EINVAL;
 		}
 		port_ptr = &i_port[0];
@@ -2101,40 +2115,40 @@ check_newline:
 	if (i_port[strlen(i_port)-1] == '\n')
 		i_port[strlen(i_port)-1] = '\0';
 
-	ret = tcm_vhost_make_nexus(tpg, port_ptr);
+	ret = vhost_scsi_make_nexus(tpg, port_ptr);
 	if (ret < 0)
 		return ret;
 
 	return count;
 }
 
-TF_TPG_BASE_ATTR(tcm_vhost, nexus, S_IRUGO | S_IWUSR);
+TF_TPG_BASE_ATTR(vhost_scsi, nexus, S_IRUGO | S_IWUSR);
 
-static struct configfs_attribute *tcm_vhost_tpg_attrs[] = {
-	&tcm_vhost_tpg_nexus.attr,
+static struct configfs_attribute *vhost_scsi_tpg_attrs[] = {
+	&vhost_scsi_tpg_nexus.attr,
 	NULL,
 };
 
 static struct se_portal_group *
-tcm_vhost_make_tpg(struct se_wwn *wwn,
+vhost_scsi_make_tpg(struct se_wwn *wwn,
 		   struct config_group *group,
 		   const char *name)
 {
-	struct tcm_vhost_tport *tport = container_of(wwn,
-			struct tcm_vhost_tport, tport_wwn);
+	struct vhost_scsi_tport *tport = container_of(wwn,
+			struct vhost_scsi_tport, tport_wwn);
 
-	struct tcm_vhost_tpg *tpg;
-	unsigned long tpgt;
+	struct vhost_scsi_tpg *tpg;
+	u16 tpgt;
 	int ret;
 
 	if (strstr(name, "tpgt_") != name)
 		return ERR_PTR(-EINVAL);
-	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX)
+	if (kstrtou16(name + 5, 10, &tpgt) || tpgt >= VHOST_SCSI_MAX_TARGET)
 		return ERR_PTR(-EINVAL);
 
-	tpg = kzalloc(sizeof(struct tcm_vhost_tpg), GFP_KERNEL);
+	tpg = kzalloc(sizeof(struct vhost_scsi_tpg), GFP_KERNEL);
 	if (!tpg) {
-		pr_err("Unable to allocate struct tcm_vhost_tpg");
+		pr_err("Unable to allocate struct vhost_scsi_tpg");
 		return ERR_PTR(-ENOMEM);
 	}
 	mutex_init(&tpg->tv_tpg_mutex);
@@ -2142,31 +2156,31 @@ tcm_vhost_make_tpg(struct se_wwn *wwn,
 	tpg->tport = tport;
 	tpg->tport_tpgt = tpgt;
 
-	ret = core_tpg_register(&tcm_vhost_fabric_configfs->tf_ops, wwn,
+	ret = core_tpg_register(&vhost_scsi_fabric_configfs->tf_ops, wwn,
 				&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
 	if (ret < 0) {
 		kfree(tpg);
 		return NULL;
 	}
-	mutex_lock(&tcm_vhost_mutex);
-	list_add_tail(&tpg->tv_tpg_list, &tcm_vhost_list);
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_lock(&vhost_scsi_mutex);
+	list_add_tail(&tpg->tv_tpg_list, &vhost_scsi_list);
+	mutex_unlock(&vhost_scsi_mutex);
 
 	return &tpg->se_tpg;
 }
 
-static void tcm_vhost_drop_tpg(struct se_portal_group *se_tpg)
+static void vhost_scsi_drop_tpg(struct se_portal_group *se_tpg)
 {
-	struct tcm_vhost_tpg *tpg = container_of(se_tpg,
-				struct tcm_vhost_tpg, se_tpg);
+	struct vhost_scsi_tpg *tpg = container_of(se_tpg,
+				struct vhost_scsi_tpg, se_tpg);
 
-	mutex_lock(&tcm_vhost_mutex);
+	mutex_lock(&vhost_scsi_mutex);
 	list_del(&tpg->tv_tpg_list);
-	mutex_unlock(&tcm_vhost_mutex);
+	mutex_unlock(&vhost_scsi_mutex);
 	/*
 	 * Release the virtual I_T Nexus for this vhost TPG
 	 */
-	tcm_vhost_drop_nexus(tpg);
+	vhost_scsi_drop_nexus(tpg);
 	/*
 	 * Deregister the se_tpg from TCM..
 	 */
@@ -2175,21 +2189,21 @@ static void tcm_vhost_drop_tpg(struct se_portal_group *se_tpg)
 }
 
 static struct se_wwn *
-tcm_vhost_make_tport(struct target_fabric_configfs *tf,
+vhost_scsi_make_tport(struct target_fabric_configfs *tf,
 		     struct config_group *group,
 		     const char *name)
 {
-	struct tcm_vhost_tport *tport;
+	struct vhost_scsi_tport *tport;
 	char *ptr;
 	u64 wwpn = 0;
 	int off = 0;
 
-	/* if (tcm_vhost_parse_wwn(name, &wwpn, 1) < 0)
+	/* if (vhost_scsi_parse_wwn(name, &wwpn, 1) < 0)
 		return ERR_PTR(-EINVAL); */
 
-	tport = kzalloc(sizeof(struct tcm_vhost_tport), GFP_KERNEL);
+	tport = kzalloc(sizeof(struct vhost_scsi_tport), GFP_KERNEL);
 	if (!tport) {
-		pr_err("Unable to allocate struct tcm_vhost_tport");
+		pr_err("Unable to allocate struct vhost_scsi_tport");
 		return ERR_PTR(-ENOMEM);
 	}
 	tport->tport_wwpn = wwpn;
@@ -2220,102 +2234,102 @@ tcm_vhost_make_tport(struct target_fabric_configfs *tf,
 	return ERR_PTR(-EINVAL);
 
 check_len:
-	if (strlen(name) >= TCM_VHOST_NAMELEN) {
+	if (strlen(name) >= VHOST_SCSI_NAMELEN) {
 		pr_err("Emulated %s Address: %s, exceeds"
-			" max: %d\n", name, tcm_vhost_dump_proto_id(tport),
-			TCM_VHOST_NAMELEN);
+			" max: %d\n", name, vhost_scsi_dump_proto_id(tport),
+			VHOST_SCSI_NAMELEN);
 		kfree(tport);
 		return ERR_PTR(-EINVAL);
 	}
-	snprintf(&tport->tport_name[0], TCM_VHOST_NAMELEN, "%s", &name[off]);
+	snprintf(&tport->tport_name[0], VHOST_SCSI_NAMELEN, "%s", &name[off]);
 
 	pr_debug("TCM_VHost_ConfigFS: Allocated emulated Target"
-		" %s Address: %s\n", tcm_vhost_dump_proto_id(tport), name);
+		" %s Address: %s\n", vhost_scsi_dump_proto_id(tport), name);
 
 	return &tport->tport_wwn;
 }
 
-static void tcm_vhost_drop_tport(struct se_wwn *wwn)
+static void vhost_scsi_drop_tport(struct se_wwn *wwn)
 {
-	struct tcm_vhost_tport *tport = container_of(wwn,
-				struct tcm_vhost_tport, tport_wwn);
+	struct vhost_scsi_tport *tport = container_of(wwn,
+				struct vhost_scsi_tport, tport_wwn);
 
 	pr_debug("TCM_VHost_ConfigFS: Deallocating emulated Target"
-		" %s Address: %s\n", tcm_vhost_dump_proto_id(tport),
+		" %s Address: %s\n", vhost_scsi_dump_proto_id(tport),
 		tport->tport_name);
 
 	kfree(tport);
 }
 
 static ssize_t
-tcm_vhost_wwn_show_attr_version(struct target_fabric_configfs *tf,
+vhost_scsi_wwn_show_attr_version(struct target_fabric_configfs *tf,
 				char *page)
 {
 	return sprintf(page, "TCM_VHOST fabric module %s on %s/%s"
-		"on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname,
+		"on "UTS_RELEASE"\n", VHOST_SCSI_VERSION, utsname()->sysname,
 		utsname()->machine);
 }
 
-TF_WWN_ATTR_RO(tcm_vhost, version);
+TF_WWN_ATTR_RO(vhost_scsi, version);
 
-static struct configfs_attribute *tcm_vhost_wwn_attrs[] = {
-	&tcm_vhost_wwn_version.attr,
+static struct configfs_attribute *vhost_scsi_wwn_attrs[] = {
+	&vhost_scsi_wwn_version.attr,
 	NULL,
 };
 
-static struct target_core_fabric_ops tcm_vhost_ops = {
-	.get_fabric_name		= tcm_vhost_get_fabric_name,
-	.get_fabric_proto_ident		= tcm_vhost_get_fabric_proto_ident,
-	.tpg_get_wwn			= tcm_vhost_get_fabric_wwn,
-	.tpg_get_tag			= tcm_vhost_get_tag,
-	.tpg_get_default_depth		= tcm_vhost_get_default_depth,
-	.tpg_get_pr_transport_id	= tcm_vhost_get_pr_transport_id,
-	.tpg_get_pr_transport_id_len	= tcm_vhost_get_pr_transport_id_len,
-	.tpg_parse_pr_out_transport_id	= tcm_vhost_parse_pr_out_transport_id,
-	.tpg_check_demo_mode		= tcm_vhost_check_true,
-	.tpg_check_demo_mode_cache	= tcm_vhost_check_true,
-	.tpg_check_demo_mode_write_protect = tcm_vhost_check_false,
-	.tpg_check_prod_mode_write_protect = tcm_vhost_check_false,
-	.tpg_alloc_fabric_acl		= tcm_vhost_alloc_fabric_acl,
-	.tpg_release_fabric_acl		= tcm_vhost_release_fabric_acl,
-	.tpg_get_inst_index		= tcm_vhost_tpg_get_inst_index,
-	.release_cmd			= tcm_vhost_release_cmd,
+static struct target_core_fabric_ops vhost_scsi_ops = {
+	.get_fabric_name		= vhost_scsi_get_fabric_name,
+	.get_fabric_proto_ident		= vhost_scsi_get_fabric_proto_ident,
+	.tpg_get_wwn			= vhost_scsi_get_fabric_wwn,
+	.tpg_get_tag			= vhost_scsi_get_tpgt,
+	.tpg_get_default_depth		= vhost_scsi_get_default_depth,
+	.tpg_get_pr_transport_id	= vhost_scsi_get_pr_transport_id,
+	.tpg_get_pr_transport_id_len	= vhost_scsi_get_pr_transport_id_len,
+	.tpg_parse_pr_out_transport_id	= vhost_scsi_parse_pr_out_transport_id,
+	.tpg_check_demo_mode		= vhost_scsi_check_true,
+	.tpg_check_demo_mode_cache	= vhost_scsi_check_true,
+	.tpg_check_demo_mode_write_protect = vhost_scsi_check_false,
+	.tpg_check_prod_mode_write_protect = vhost_scsi_check_false,
+	.tpg_alloc_fabric_acl		= vhost_scsi_alloc_fabric_acl,
+	.tpg_release_fabric_acl		= vhost_scsi_release_fabric_acl,
+	.tpg_get_inst_index		= vhost_scsi_tpg_get_inst_index,
+	.release_cmd			= vhost_scsi_release_cmd,
 	.check_stop_free		= vhost_scsi_check_stop_free,
-	.shutdown_session		= tcm_vhost_shutdown_session,
-	.close_session			= tcm_vhost_close_session,
-	.sess_get_index			= tcm_vhost_sess_get_index,
+	.shutdown_session		= vhost_scsi_shutdown_session,
+	.close_session			= vhost_scsi_close_session,
+	.sess_get_index			= vhost_scsi_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
-	.write_pending			= tcm_vhost_write_pending,
-	.write_pending_status		= tcm_vhost_write_pending_status,
-	.set_default_node_attributes	= tcm_vhost_set_default_node_attrs,
-	.get_task_tag			= tcm_vhost_get_task_tag,
-	.get_cmd_state			= tcm_vhost_get_cmd_state,
-	.queue_data_in			= tcm_vhost_queue_data_in,
-	.queue_status			= tcm_vhost_queue_status,
-	.queue_tm_rsp			= tcm_vhost_queue_tm_rsp,
-	.aborted_task			= tcm_vhost_aborted_task,
+	.write_pending			= vhost_scsi_write_pending,
+	.write_pending_status		= vhost_scsi_write_pending_status,
+	.set_default_node_attributes	= vhost_scsi_set_default_node_attrs,
+	.get_task_tag			= vhost_scsi_get_task_tag,
+	.get_cmd_state			= vhost_scsi_get_cmd_state,
+	.queue_data_in			= vhost_scsi_queue_data_in,
+	.queue_status			= vhost_scsi_queue_status,
+	.queue_tm_rsp			= vhost_scsi_queue_tm_rsp,
+	.aborted_task			= vhost_scsi_aborted_task,
 	/*
 	 * Setup callers for generic logic in target_core_fabric_configfs.c
 	 */
-	.fabric_make_wwn		= tcm_vhost_make_tport,
-	.fabric_drop_wwn		= tcm_vhost_drop_tport,
-	.fabric_make_tpg		= tcm_vhost_make_tpg,
-	.fabric_drop_tpg		= tcm_vhost_drop_tpg,
-	.fabric_post_link		= tcm_vhost_port_link,
-	.fabric_pre_unlink		= tcm_vhost_port_unlink,
+	.fabric_make_wwn		= vhost_scsi_make_tport,
+	.fabric_drop_wwn		= vhost_scsi_drop_tport,
+	.fabric_make_tpg		= vhost_scsi_make_tpg,
+	.fabric_drop_tpg		= vhost_scsi_drop_tpg,
+	.fabric_post_link		= vhost_scsi_port_link,
+	.fabric_pre_unlink		= vhost_scsi_port_unlink,
 	.fabric_make_np			= NULL,
 	.fabric_drop_np			= NULL,
-	.fabric_make_nodeacl		= tcm_vhost_make_nodeacl,
-	.fabric_drop_nodeacl		= tcm_vhost_drop_nodeacl,
+	.fabric_make_nodeacl		= vhost_scsi_make_nodeacl,
+	.fabric_drop_nodeacl		= vhost_scsi_drop_nodeacl,
 };
 
-static int tcm_vhost_register_configfs(void)
+static int vhost_scsi_register_configfs(void)
 {
 	struct target_fabric_configfs *fabric;
 	int ret;
 
-	pr_debug("TCM_VHOST fabric module %s on %s/%s"
-		" on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname,
+	pr_debug("vhost-scsi fabric module %s on %s/%s"
+		" on "UTS_RELEASE"\n", VHOST_SCSI_VERSION, utsname()->sysname,
 		utsname()->machine);
 	/*
 	 * Register the top level struct config_item_type with TCM core
@@ -2326,14 +2340,14 @@ static int tcm_vhost_register_configfs(void)
 		return PTR_ERR(fabric);
 	}
 	/*
-	 * Setup fabric->tf_ops from our local tcm_vhost_ops
+	 * Setup fabric->tf_ops from our local vhost_scsi_ops
 	 */
-	fabric->tf_ops = tcm_vhost_ops;
+	fabric->tf_ops = vhost_scsi_ops;
 	/*
 	 * Setup default attribute lists for various fabric->tf_cit_tmpl
 	 */
-	fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_vhost_wwn_attrs;
-	fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_vhost_tpg_attrs;
+	fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = vhost_scsi_wwn_attrs;
+	fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = vhost_scsi_tpg_attrs;
 	fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
 	fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
 	fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
@@ -2353,37 +2367,37 @@ static int tcm_vhost_register_configfs(void)
 	/*
 	 * Setup our local pointer to *fabric
 	 */
-	tcm_vhost_fabric_configfs = fabric;
-	pr_debug("TCM_VHOST[0] - Set fabric -> tcm_vhost_fabric_configfs\n");
+	vhost_scsi_fabric_configfs = fabric;
+	pr_debug("TCM_VHOST[0] - Set fabric -> vhost_scsi_fabric_configfs\n");
 	return 0;
 };
 
-static void tcm_vhost_deregister_configfs(void)
+static void vhost_scsi_deregister_configfs(void)
 {
-	if (!tcm_vhost_fabric_configfs)
+	if (!vhost_scsi_fabric_configfs)
 		return;
 
-	target_fabric_configfs_deregister(tcm_vhost_fabric_configfs);
-	tcm_vhost_fabric_configfs = NULL;
-	pr_debug("TCM_VHOST[0] - Cleared tcm_vhost_fabric_configfs\n");
+	target_fabric_configfs_deregister(vhost_scsi_fabric_configfs);
+	vhost_scsi_fabric_configfs = NULL;
+	pr_debug("TCM_VHOST[0] - Cleared vhost_scsi_fabric_configfs\n");
 };
 
-static int __init tcm_vhost_init(void)
+static int __init vhost_scsi_init(void)
 {
 	int ret = -ENOMEM;
 	/*
 	 * Use our own dedicated workqueue for submitting I/O into
 	 * target core to avoid contention within system_wq.
 	 */
-	tcm_vhost_workqueue = alloc_workqueue("tcm_vhost", 0, 0);
-	if (!tcm_vhost_workqueue)
+	vhost_scsi_workqueue = alloc_workqueue("vhost_scsi", 0, 0);
+	if (!vhost_scsi_workqueue)
 		goto out;
 
 	ret = vhost_scsi_register();
 	if (ret < 0)
 		goto out_destroy_workqueue;
 
-	ret = tcm_vhost_register_configfs();
+	ret = vhost_scsi_register_configfs();
 	if (ret < 0)
 		goto out_vhost_scsi_deregister;
 
@@ -2392,20 +2406,20 @@ static int __init tcm_vhost_init(void)
 out_vhost_scsi_deregister:
 	vhost_scsi_deregister();
 out_destroy_workqueue:
-	destroy_workqueue(tcm_vhost_workqueue);
+	destroy_workqueue(vhost_scsi_workqueue);
 out:
 	return ret;
 };
 
-static void tcm_vhost_exit(void)
+static void vhost_scsi_exit(void)
 {
-	tcm_vhost_deregister_configfs();
+	vhost_scsi_deregister_configfs();
 	vhost_scsi_deregister();
-	destroy_workqueue(tcm_vhost_workqueue);
+	destroy_workqueue(vhost_scsi_workqueue);
 };
 
 MODULE_DESCRIPTION("VHOST_SCSI series fabric driver");
 MODULE_ALIAS("tcm_vhost");
 MODULE_LICENSE("GPL");
-module_init(tcm_vhost_init);
-module_exit(tcm_vhost_exit);
+module_init(vhost_scsi_init);
+module_exit(vhost_scsi_exit);
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h
index cbcff38ac9b7..d3583d3ee193 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -880,4 +880,18 @@ struct iscsit_global {
 	struct iscsi_portal_group	*discovery_tpg;
 };
 
+static inline u32 session_get_next_ttt(struct iscsi_session *session)
+{
+	u32 ttt;
+
+	spin_lock_bh(&session->ttt_lock);
+	ttt = session->targ_xfer_tag++;
+	if (ttt == 0xFFFFFFFF)
+		ttt = session->targ_xfer_tag++;
+	spin_unlock_bh(&session->ttt_lock);
+
+	return ttt;
+}
+
+extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
 #endif /* ISCSI_TARGET_CORE_H */
diff --git a/drivers/target/iscsi/iscsi_target_stat.h b/include/target/iscsi/iscsi_target_stat.h
index 3ff76b4faad3..3ff76b4faad3 100644
--- a/drivers/target/iscsi/iscsi_target_stat.h
+++ b/include/target/iscsi/iscsi_target_stat.h
diff --git a/include/target/iscsi/iscsi_transport.h b/include/target/iscsi/iscsi_transport.h
index daef9daa500c..e6bb166f12c2 100644
--- a/include/target/iscsi/iscsi_transport.h
+++ b/include/target/iscsi/iscsi_transport.h
@@ -1,6 +1,6 @@
 #include <linux/module.h>
 #include <linux/list.h>
-#include "../../../drivers/target/iscsi/iscsi_target_core.h"
+#include "iscsi_target_core.h"
 
 struct iscsit_transport {
 #define ISCSIT_TRANSPORT_NAME	16
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 4a8795a87b9e..672150b6aaf5 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -407,7 +407,7 @@ struct t10_reservation {
 	/* Activate Persistence across Target Power Loss enabled
 	 * for SCSI device */
 	int pr_aptpl_active;
-#define PR_APTPL_BUF_LEN			8192
+#define PR_APTPL_BUF_LEN			262144
 	u32 pr_generation;
 	spinlock_t registration_lock;
 	spinlock_t aptpl_reg_lock;